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A Study to Explore the Antiviral Activity, Clinical Outcomes, Safety, Tolerability, and Pharmacokinetics of JNJ-53718678 at Two Dose Levels in Non-Hospitalized Adult Participants Infected With Respiratory Syncytial Virus

A Pilot Phase 2a, Randomized, Double-blind, Placebo-controlled Study to Explore the Antiviral Activity, Clinical Outcomes, Safety, Tolerability, and Pharmacokinetics of JNJ-53718678 at Two Dose Levels in Non-Hospitalized Adult Subjects Infected With Respiratory Syncytial Virus

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03379675
Enrollment
72
Registered
2017-12-20
Start date
2018-02-06
Completion date
2019-12-26
Last updated
2025-02-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Respiratory Syncytial Virus Infections

Brief summary

The purpose of this study is to explore the antiviral effect of JNJ-53718678 at 2 dose levels (80 milligrams \[mg\] and 500 mg) once daily for 7 days in adults with Respiratory Syncytial Virus (RSV) infection, as measured by RSV viral load in nasal secretions by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay.

Detailed description

This study will be performed to explore the antiviral activity, clinical outcomes, safety, tolerability, and pharmacokinetics of JNJ-53718678 in adult participants infected with RSV. The study will include both participants who are otherwise healthy (ie, without underlying condition) or who have comorbid conditions (eg, asthma, chronic obstructive pulmonary disease (COPD), cardiovascular disease, other chronic diseases), with the exception of immunocompromised participants, presenting for medical care but not requiring hospitalization. The study will include a screening period (Day -1 to Day 1), a treatment Period (Day 1 to Day 8), and a follow-up period (Day 9 to Day 28). Safety evaluations will include adverse events, laboratory tests, electrocardiogram, vital signs, physical examination, and specific toxicities.

Interventions

Participants will receive 500 mg dose of JNJ-53718678 oral solution once daily for 7 days.

DRUGJNJ-53718678 80 mg

Participants will receive 80 mg dose of JNJ-53718678 oral solution along with the matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.

DRUGPlacebo

In treatment B, participants will receive matching placebo along with JNJ-53718678 to maintain the same total volume as for the 500 mg dose once daily for 7 days. In treatment C, participants will receive matching placebo to the same total volume as for the 500 mg dose once daily for 7 days.

Sponsors

Janssen Research & Development, LLC
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Participants must have an acute respiratory illness with signs and symptoms consistent with a viral infection (example, fever, cough, nasal congestion, runny nose, sore throat, myalgia, lethargy, shortness of breath, or wheezing) with onset less than or equal to 5 days from the anticipated time of randomization. Onset of symptoms is defined as the time the participant becomes aware of the first sign and/or symptom consistent with a viral infection * Participant has been diagnosed with respiratory syncytial virus (RSV) infection using a rapid polymerase chain reaction (PCR) based or rapid-antigen-detection test * Before randomization, a woman must be not of childbearing potential defined as: Premenarchal, Postmenopausal or Permanently sterile * A male participant must agree to the use of acceptable contraceptive measures * With the exception of the RSV-related illness the participant must be medically stable on the basis of physical examination, medical history, vital signs, and electrocardiogram (ECG) performed at screening

Exclusion criteria

* Hospitalized participants or participants expected to be hospitalized within 24 hours of screening * History of or concurrent illness (beyond a comorbid condition) that in the opinion of the investigator, might confound the results of the study or pose an additional risk in administering study drug to the participant or that could prevent, limit, or confound the protocol-specified assessments * Participants who had major surgery within the 28 days prior to randomization or have planned major surgery through the course of the study * Participants who are considered by the investigator to be immunocompromised within the past 12 months * Participant has known or suspected chronic or acute hepatitis B or C infection * Women who are pregnant or breastfeeding * Participants with clinically significant abnormal ECG findings (other than QT-interval corrected for heart rate according to Fridericia \[QTcF\] interval greater than \[\>\] 500 millisecond \[ms\]) not consistent with the underlying condition in the study population, as judged by the investigator

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants With Undetectable RSV Viral Load at Day 21Day 21Percentage of participants with undetectable RSV viral load at Day 21 were reported.
Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5Baseline through Day 5Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.
Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8Baseline through Day 8Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.
Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14Baseline through Day 14Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.
Change From Baseline in RSV Viral Load at Day 3Baseline to Day 3Change from baseline in RSV viral load at Day 3 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
Change From Baseline in RSV Viral Load at Day 5Baseline to Day 5Change from baseline in RSV viral load at Day 5 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
Change From Baseline in RSV Viral Load at Day 8Baseline to Day 8Change from baseline in RSV viral load at Day 8 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
Change From Baseline in RSV Viral Load at Day 14Baseline to Day 14Change from baseline in RSV viral load at Day 14 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
Change From Baseline in RSV Viral Load at Day 21Baseline to Day 21Change from baseline in RSV viral load oat Day 21 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at BaselineBaselineRSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at Day 3Day 3RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at Day 5Day 5RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at Day 8Day 8RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at Day 14Day 14RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
RSV Viral Load at Day 21Day 21RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.
Time to Undetectable RSV Viral LoadUp to Day 21The time to undetectable nasal RSV RNA viral load was defined as the time in days from initiation of study treatment until first post-baseline time point at which RSV RNA was undetectable and after which time there were no more detectable virus assessments.
Percentage of Participants With Undetectable RSV Viral Load at Day 3Day 3Percentage of participants with undetectable RSV viral load at Day 3 were reported.
Percentage of Participants With Undetectable RSV Viral Load at Day 5Day 5Percentage of participants with undetectable RSV viral load at Day 5 were reported.
Percentage of Participants With Undetectable RSV Viral Load at Day 8Day 8Percentage of participants with undetectable RSV viral load at Day 8 were reported.
Percentage of Participants With Undetectable RSV Viral Load at Day 14Day 14Percentage of participants with undetectable RSV viral load at Day 14 were reported.
Area Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3Baseline through Day 3Area under the RSV VL-time curve (AUC) was determined as log10 copies\*hour per milliliter (Log10 copies\*hr/mL) by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay of mid turbine nasal swabs.

Secondary

MeasureTime frameDescription
Number of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUp to Day 28Number of participants with worst treatment-emergent laboratory abnormalities (serum chemistry, hematology and urinalyses) were reported based on DMID toxicity grading scale. DMID toxicity grade categorized as Grade 1=mild(mild discomfort (\< 48 hours); no medical intervention/therapy required), Grade 2= moderate (Moderate Mild to moderate limitation in activity - some assistance may be needed; no or minimal medical intervention/therapy required), Grade 3= severe (severe Marked limitation in activity, some assistance usually required; medical intervention/therapy required, hospitalizations possible), and Grade 4=life threatening (extreme limitation in activity, significant assistance required; significant medical intervention/therapy required, hospitalization or hospice care probable).
Number of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesUp to Day 28Number of participants with worst treatment emergent vital sign abnormalities (including Systolic blood pressure \[SBP\] and diastolic blood pressure \[DBP\]) as abnormally low, mild increased, moderate increased and severe increased were reported. SBP: Abnormally low- Less than or equal to (\<=) 50 mmHg, Grade 1 (mild)- 90 mmHg - \< 100 mmHg, Grade 2 (moderate)- greater than or equal to (\>=)100 mmHg to \< 110 mmHg, Grade 3 (severe)- \>=110 mmHg; DBP: Abnormally low- \<=90 mmHg, Grade 1 (mild)- 140 mmHg - \< 160 mmHg, Grade 2 (moderate)- \>=160 mmHg to \< 180 mmHg, Grade 3 (severe)- \>=180 mmHg.
Number of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesUp to Day 28The number of participants with worst TE ECG abnormalities were reported. The ECG variables that were analyzed included heart rate, PR interval, QRS interval, QT interval, and corrected QT (QTc) interval. Parameters for abnormal ECG findings were QT interval corrected for heart rate (QTc) according to Bazett's formula (QTcB or Borderline Prolonged QTcB) Interval (\[450 milliseconds {ms}, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]), QTc according to Fridericia's formula (QTcF or Borderline Prolonged QTcB) Interval (\[450 ms, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]).
Peripheral Capillary Oxygen Saturation (SpO2) Over TimeBaseline, Days 3, 8, 14, and 21Peripheral capillary oxygen saturation was measured by the investigator over time.
Change From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Days 3, 8, 14 and 21Change from baseline in peripheral capillary oxygen saturation levels was calculated by the investigator.
Pulse Rate Over TimeBaseline, Days 3, 8, 14 and 21Pulse rate was measured by the investigator over time.
Change From Baseline in Pulse RateBaseline to Days 3, 8, 14 and 21Change from baseline in pulse rate was calculated and reported by the investigator.
Respiratory Rate Over TimeBaseline, Days 3, 8, 14 and 21Respiratory rate was measured by the investigator over time.
Change From Baseline in Respiratory RateBaseline to Days 3, 8, 14 and 21Change from baseline in respiratory rate was calculated and reported by the investigator.
Body Temperature Over TimeBaseline, Days 3, 8, 14 and 21Body temperature was measured over time. Participants were provided a thermometer and asked to record body temperature in the electronic device.
Change From Baseline in Body TemperatureBaseline to Days 3, 5, 8, 14 and 21Change from baseline in body temperature was calculated and reported. Participants were provided a thermometer and asked to record body temperature in the electronic device.
Area Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post Dose0 to 24 hours post dose on Days 1 and 7AUC (0-24) is defined as area under the plasma concentration-time curve from time point 0 hours until 24 hours post dose.
Severity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBaseline, Days 3, 5, 8, 14 and 21The severity of signs and symptoms of RSV infection was assessed using the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO domain score ranges from 0 (symptom free) to 4 (very severe symptoms). Domain scores were calculated as the arithmetic mean of the scores for items within the domain.
Duration of Signs and Symptoms of RSV Assessed by RI-PROBaseline up to Day 21Duration of signs and symptoms of RSV infection was assessed by the time to resolution of all RSV symptoms from RI-PRO questionnaire. Resolution was defined as a score of 'Not at all/symptom-free' (score=0) or 'A little bit' (score=1) for at least 24 hours. The RI-PRO questionnaire is a 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items) and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).
Time to Resolution of Key RSV Symptoms as Assessed by RI-PRO QuestionnaireUp to Day 21Time to resolution of key RSV symptoms (congested or stuffy nose, sore or painful throat, trouble breathing, chest tightness, coughing, coughed up mucus or phlegm, weak or tired) as assessed by RI-PRO questionnaire was reported. Resolution of RSV symptoms was defined as a score of 'Not at all/symptom free' (score = 0) or 'A little bit' (score = 1) for at least 24 hours for symptoms of the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).
Time to Return to Usual Activity/Health Based on RI-PRO QuestionnaireUp to Day 21Time from the first dose of study drug until the time to return to usual activity/health was determined. Return to usual activity/health when the response is 'Yes' on RI-PRO additional question 7 ('Have you returned to your usual activity/health today?') for at least 24 hours.
Predose Plasma Concentration (Ctrough) of JNJ-53718678Predose on Days 1 and 7Ctrough is the trough plasma concentration of JNJ-53718678 estimated by population PK model.
Maximum Plasma Concentration (Cmax) of JNJ-53718678Days 1 and 7Cmax is the maximum plasma concentration of JNJ-53718678 estimated by population PK model.
Number of Participants With Adverse Events (AEs) as a Measure of Safety and TolerabilityUp to Day 28An adverse event is any untoward medical event that occurs in a participant administered an investigational product, and it does not necessarily indicate only events with clear causal relationship with the relevant investigational product.

Countries

Argentina, Australia, Belgium, Brazil, Bulgaria, Canada, France, Germany, Japan, Mexico, Poland, Russia, South Africa, South Korea, Spain, Sweden, Taiwan, Ukraine, United States

Participant flow

Participants by arm

ArmCount
Treatment A: JNJ-53718678 500 mg
Participants received JNJ-53718678 500 milligrams (mg) as an oral solution once daily for 7 days.
24
Treatment B: JNJ-53718678 80 mg + Placebo
Participants received JNJ-53718678 80 mg as an oral solution once daily for 7 days. In addition, participants received matching placebo to maintain the blinding.
24
Treatment C: Placebo
Participants received matching placebo as an oral solution once daily for 7 days.
24
Total72

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyAdverse Event200
Overall StudyLost to Follow-up010
Overall StudyWithdrawal by Subject212

Baseline characteristics

CharacteristicTreatment A: JNJ-53718678 500 mgTreatment C: PlaceboTotalTreatment B: JNJ-53718678 80 mg + Placebo
Age, Continuous51.7 years
STANDARD_DEVIATION 17.89
58.9 years
STANDARD_DEVIATION 14.16
53 years
STANDARD_DEVIATION 16.92
48.4 years
STANDARD_DEVIATION 17.39
Ethnicity (NIH/OMB)
Hispanic or Latino
7 Participants8 Participants23 Participants8 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
17 Participants15 Participants48 Participants16 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants1 Participants1 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
1 Participants0 Participants1 Participants0 Participants
Race (NIH/OMB)
Asian
1 Participants4 Participants7 Participants2 Participants
Race (NIH/OMB)
Black or African American
1 Participants0 Participants3 Participants2 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants1 Participants1 Participants0 Participants
Race (NIH/OMB)
White
21 Participants19 Participants60 Participants20 Participants
Region of Enrollment
Argentina
4 Participants5 Participants12 Participants3 Participants
Region of Enrollment
Belgium
0 Participants1 Participants1 Participants0 Participants
Region of Enrollment
Brazil
1 Participants1 Participants5 Participants3 Participants
Region of Enrollment
Bulgaria
2 Participants2 Participants7 Participants3 Participants
Region of Enrollment
Canada
4 Participants3 Participants10 Participants3 Participants
Region of Enrollment
France
0 Participants1 Participants1 Participants0 Participants
Region of Enrollment
Germany
3 Participants3 Participants6 Participants0 Participants
Region of Enrollment
Mexico
2 Participants2 Participants6 Participants2 Participants
Region of Enrollment
Poland
3 Participants2 Participants8 Participants3 Participants
Region of Enrollment
Russia
0 Participants0 Participants1 Participants1 Participants
Region of Enrollment
Spain
1 Participants1 Participants2 Participants0 Participants
Region of Enrollment
Sweden
0 Participants0 Participants2 Participants2 Participants
Region of Enrollment
Taiwan, Province Of China
0 Participants1 Participants2 Participants1 Participants
Region of Enrollment
Ukraine
2 Participants0 Participants3 Participants1 Participants
Region of Enrollment
United States
2 Participants2 Participants6 Participants2 Participants
Sex: Female, Male
Female
12 Participants14 Participants37 Participants11 Participants
Sex: Female, Male
Male
12 Participants10 Participants35 Participants13 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 240 / 240 / 24
other
Total, other adverse events
6 / 2413 / 2411 / 24
serious
Total, serious adverse events
0 / 240 / 240 / 24

Outcome results

Primary

Area Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3

Area under the RSV VL-time curve (AUC) was determined as log10 copies\*hour per milliliter (Log10 copies\*hr/mL) by quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay of mid turbine nasal swabs.

Time frame: Baseline through Day 3

Population: The intent-to-treat-infected (ITT-i) population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgArea Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3207.3 Log10 copies*hr/mLStandard Deviation 89.55
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3246.3 Log10 copies*hr/mLStandard Deviation 67.39
Treatment C: PlaceboArea Under the Respiratory Syncytial Virus (RSV) Viral Load (VL)-Time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 3203.4 Log10 copies*hr/mLStandard Deviation 87.63
Primary

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Time frame: Baseline through Day 14

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14534.4 Log10 copies*hr/mLStandard Deviation 379.92
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14747.1 Log10 copies*hr/mLStandard Deviation 352.25
Treatment C: PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 14619.9 Log10 copies*hr/mLStandard Deviation 394.15
Primary

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Time frame: Baseline through Day 5

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5344.5 Log10 copies*hr/mLStandard Deviation 189.4
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5424.2 Log10 copies*hr/mLStandard Deviation 145.73
Treatment C: PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 5340.4 Log10 copies*hr/mLStandard Deviation 148.3
Primary

Area Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8

Area under the RSV VL-time curve (AUC) was determined as Log10 copies\*hr/mL by qRT-PCR assay of mid turbine nasal swabs.

Time frame: Baseline through Day 8

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8470.7 Log10 copies*hr/mLStandard Deviation 305.38
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8612.3 Log10 copies*hr/mLStandard Deviation 253.29
Treatment C: PlaceboArea Under the RSV VL-time Curve (AUC) From Immediately Prior to First Dose of Study Drug (Baseline) Through Day 8486.1 Log10 copies*hr/mLStandard Deviation 254.15
Primary

Change From Baseline in RSV Viral Load at Day 14

Change from baseline in RSV viral load at Day 14 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline to Day 14

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in RSV Viral Load at Day 14-5.135 Log10 copies/mLStandard Deviation 1.6444
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in RSV Viral Load at Day 14-5.777 Log10 copies/mLStandard Deviation 1.6183
Treatment C: PlaceboChange From Baseline in RSV Viral Load at Day 14-4.858 Log10 copies/mLStandard Deviation 1.7419
Primary

Change From Baseline in RSV Viral Load at Day 21

Change from baseline in RSV viral load oat Day 21 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline to Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in RSV Viral Load at Day 21-5.433 Log10 copies/mLStandard Deviation 2.1416
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in RSV Viral Load at Day 21-5.898 Log10 copies/mLStandard Deviation 1.6421
Treatment C: PlaceboChange From Baseline in RSV Viral Load at Day 21-5.129 Log10 copies/mLStandard Deviation 1.6513
Primary

Change From Baseline in RSV Viral Load at Day 3

Change from baseline in RSV viral load at Day 3 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline to Day 3

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in RSV Viral Load at Day 3-2.210 Log10 copies/mLStandard Deviation 1.7185
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in RSV Viral Load at Day 3-1.436 Log10 copies/mLStandard Deviation 1.6165
Treatment C: PlaceboChange From Baseline in RSV Viral Load at Day 3-2.221 Log10 copies/mLStandard Deviation 1.7093
Primary

Change From Baseline in RSV Viral Load at Day 5

Change from baseline in RSV viral load at Day 5 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline to Day 5

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in RSV Viral Load at Day 5-3.156 Log10 copies/mLStandard Deviation 2.2887
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in RSV Viral Load at Day 5-2.324 Log10 copies/mLStandard Deviation 1.6727
Treatment C: PlaceboChange From Baseline in RSV Viral Load at Day 5-3.031 Log10 copies/mLStandard Deviation 1.501
Primary

Change From Baseline in RSV Viral Load at Day 8

Change from baseline in RSV viral load at Day 8 was measured as Log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline to Day 8

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in RSV Viral Load at Day 8-4.960 Log10 copies/mLStandard Deviation 1.7804
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in RSV Viral Load at Day 8-3.983 Log10 copies/mLStandard Deviation 1.3928
Treatment C: PlaceboChange From Baseline in RSV Viral Load at Day 8-3.953 Log10 copies/mLStandard Deviation 1.5674
Primary

Percentage of Participants With Undetectable RSV Viral Load at Day 14

Percentage of participants with undetectable RSV viral load at Day 14 were reported.

Time frame: Day 14

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (NUMBER)
Treatment A: JNJ-53718678 500 mgPercentage of Participants With Undetectable RSV Viral Load at Day 1489.5 Percentage of participants
Treatment B: JNJ-53718678 80 mg + PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 1488.9 Percentage of participants
Treatment C: PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 1478.9 Percentage of participants
Primary

Percentage of Participants With Undetectable RSV Viral Load at Day 21

Percentage of participants with undetectable RSV viral load at Day 21 were reported.

Time frame: Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (NUMBER)
Treatment A: JNJ-53718678 500 mgPercentage of Participants With Undetectable RSV Viral Load at Day 2195.0 Percentage of participants
Treatment B: JNJ-53718678 80 mg + PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 2194.7 Percentage of participants
Treatment C: PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 2190.0 Percentage of participants
Primary

Percentage of Participants With Undetectable RSV Viral Load at Day 3

Percentage of participants with undetectable RSV viral load at Day 3 were reported.

Time frame: Day 3

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (NUMBER)
Treatment A: JNJ-53718678 500 mgPercentage of Participants With Undetectable RSV Viral Load at Day 328.6 Percentage of participants
Treatment B: JNJ-53718678 80 mg + PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 35.0 Percentage of participants
Treatment C: PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 320.0 Percentage of participants
Primary

Percentage of Participants With Undetectable RSV Viral Load at Day 5

Percentage of participants with undetectable RSV viral load at Day 5 were reported.

Time frame: Day 5

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (NUMBER)
Treatment A: JNJ-53718678 500 mgPercentage of Participants With Undetectable RSV Viral Load at Day 540.0 Percentage of participants
Treatment B: JNJ-53718678 80 mg + PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 514.3 Percentage of participants
Treatment C: PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 535.0 Percentage of participants
Primary

Percentage of Participants With Undetectable RSV Viral Load at Day 8

Percentage of participants with undetectable RSV viral load at Day 8 were reported.

Time frame: Day 8

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (NUMBER)
Treatment A: JNJ-53718678 500 mgPercentage of Participants With Undetectable RSV Viral Load at Day 883.3 Percentage of participants
Treatment B: JNJ-53718678 80 mg + PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 845.0 Percentage of participants
Treatment C: PlaceboPercentage of Participants With Undetectable RSV Viral Load at Day 852.4 Percentage of participants
Primary

RSV Viral Load at Baseline

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Baseline

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Baseline5.523 Log10 copies/mLStandard Deviation 1.7911
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Baseline5.851 Log10 copies/mLStandard Deviation 1.6777
Treatment C: PlaceboRSV Viral Load at Baseline5.285 Log10 copies/mLStandard Deviation 1.7158
Primary

RSV Viral Load at Day 14

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Day 14

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Day 140.421 Log10 copies/mLStandard Deviation 1.2601
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Day 140.290 Log10 copies/mLStandard Deviation 0.8579
Treatment C: PlaceboRSV Viral Load at Day 140.492 Log10 copies/mLStandard Deviation 0.991
Primary

RSV Viral Load at Day 21

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Day 210.108 Log10 copies/mLStandard Deviation 0.4808
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Day 210.113 Log10 copies/mLStandard Deviation 0.4932
Treatment C: PlaceboRSV Viral Load at Day 210.253 Log10 copies/mLStandard Deviation 0.7866
Primary

RSV Viral Load at Day 3

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Day 3

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Day 33.267 Log10 copies/mLStandard Deviation 2.549
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Day 34.448 Log10 copies/mLStandard Deviation 1.9513
Treatment C: PlaceboRSV Viral Load at Day 33.160 Log10 copies/mLStandard Deviation 2.2603
Primary

RSV Viral Load at Day 5

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Day 5

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Day 52.384 Log10 copies/mLStandard Deviation 2.4214
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Day 53.528 Log10 copies/mLStandard Deviation 1.9824
Treatment C: PlaceboRSV Viral Load at Day 52.351 Log10 copies/mLStandard Deviation 2.1302
Primary

RSV Viral Load at Day 8

RSV viral load was measured as log10 copies/mL by qRT-PCR assay in the mid-turbinate nasal swab specimens.

Time frame: Day 8

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRSV Viral Load at Day 80.661 Log10 copies/mLStandard Deviation 1.5572
Treatment B: JNJ-53718678 80 mg + PlaceboRSV Viral Load at Day 81.804 Log10 copies/mLStandard Deviation 1.7888
Treatment C: PlaceboRSV Viral Load at Day 81.398 Log10 copies/mLStandard Deviation 1.5958
Primary

Time to Undetectable RSV Viral Load

The time to undetectable nasal RSV RNA viral load was defined as the time in days from initiation of study treatment until first post-baseline time point at which RSV RNA was undetectable and after which time there were no more detectable virus assessments.

Time frame: Up to Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection.

ArmMeasureValue (MEDIAN)Dispersion
Treatment A: JNJ-53718678 500 mgTime to Undetectable RSV Viral Load7.0 Days90% Confidence Interval 5.92
Treatment B: JNJ-53718678 80 mg + PlaceboTime to Undetectable RSV Viral Load8.0 Days90% Confidence Interval 6.86
Treatment C: PlaceboTime to Undetectable RSV Viral Load9.7 Days90% Confidence Interval 7.03
Secondary

Area Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post Dose

AUC (0-24) is defined as area under the plasma concentration-time curve from time point 0 hours until 24 hours post dose.

Time frame: 0 to 24 hours post dose on Days 1 and 7

Population: Pharmacokinetic (PK) analysis set included all participants who received JNJ-53718678 and for whom at least one PK concentration was reported. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgArea Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post DoseDay 129800 nanograms*hours per milliliter (ng*h/mL)Standard Deviation 9180
Treatment A: JNJ-53718678 500 mgArea Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post DoseDay 741200 nanograms*hours per milliliter (ng*h/mL)Standard Deviation 15300
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post DoseDay 14530 nanograms*hours per milliliter (ng*h/mL)Standard Deviation 1560
Treatment B: JNJ-53718678 80 mg + PlaceboArea Under the Plasma Concentration-Time Curve From Time Point 0 Hours Until 24 Hours Post DoseDay 75470 nanograms*hours per milliliter (ng*h/mL)Standard Deviation 1620
Secondary

Body Temperature Over Time

Body temperature was measured over time. Participants were provided a thermometer and asked to record body temperature in the electronic device.

Time frame: Baseline, Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgBody Temperature Over TimeDay 1436.37 degree CelsiusStandard Deviation 0.389
Treatment A: JNJ-53718678 500 mgBody Temperature Over TimeDay 836.26 degree CelsiusStandard Deviation 0.396
Treatment A: JNJ-53718678 500 mgBody Temperature Over TimeBaseline36.83 degree CelsiusStandard Deviation 0.622
Treatment A: JNJ-53718678 500 mgBody Temperature Over TimeDay 336.57 degree CelsiusStandard Deviation 0.572
Treatment A: JNJ-53718678 500 mgBody Temperature Over TimeDay 2136.32 degree CelsiusStandard Deviation 0.38
Treatment B: JNJ-53718678 80 mg + PlaceboBody Temperature Over TimeDay 836.44 degree CelsiusStandard Deviation 0.527
Treatment B: JNJ-53718678 80 mg + PlaceboBody Temperature Over TimeBaseline36.73 degree CelsiusStandard Deviation 0.601
Treatment B: JNJ-53718678 80 mg + PlaceboBody Temperature Over TimeDay 336.65 degree CelsiusStandard Deviation 0.574
Treatment B: JNJ-53718678 80 mg + PlaceboBody Temperature Over TimeDay 1436.38 degree CelsiusStandard Deviation 0.346
Treatment B: JNJ-53718678 80 mg + PlaceboBody Temperature Over TimeDay 2136.40 degree CelsiusStandard Deviation 0.38
Treatment C: PlaceboBody Temperature Over TimeDay 2136.46 degree CelsiusStandard Deviation 0.299
Treatment C: PlaceboBody Temperature Over TimeDay 1436.50 degree CelsiusStandard Deviation 0.291
Treatment C: PlaceboBody Temperature Over TimeBaseline36.75 degree CelsiusStandard Deviation 0.561
Treatment C: PlaceboBody Temperature Over TimeDay 836.55 degree CelsiusStandard Deviation 0.404
Treatment C: PlaceboBody Temperature Over TimeDay 336.69 degree CelsiusStandard Deviation 0.446
Secondary

Change From Baseline in Body Temperature

Change from baseline in body temperature was calculated and reported. Participants were provided a thermometer and asked to record body temperature in the electronic device.

Time frame: Baseline to Days 3, 5, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in Body TemperatureBaseline to Day 14-0.48 degree CelsiusStandard Deviation 0.402
Treatment A: JNJ-53718678 500 mgChange From Baseline in Body TemperatureBaseline to Day 8-0.55 degree CelsiusStandard Deviation 0.465
Treatment A: JNJ-53718678 500 mgChange From Baseline in Body TemperatureBaseline to Day 3-0.27 degree CelsiusStandard Deviation 0.39
Treatment A: JNJ-53718678 500 mgChange From Baseline in Body TemperatureBaseline to Day 5-0.63 degree CelsiusStandard Deviation 0.667
Treatment A: JNJ-53718678 500 mgChange From Baseline in Body TemperatureBaseline to Day 21-0.52 degree CelsiusStandard Deviation 0.537
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Body TemperatureBaseline to Day 8-0.29 degree CelsiusStandard Deviation 0.652
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Body TemperatureBaseline to Day 3-0.11 degree CelsiusStandard Deviation 0.621
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Body TemperatureBaseline to Day 5-0.41 degree CelsiusStandard Deviation 0.645
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Body TemperatureBaseline to Day 14-0.40 degree CelsiusStandard Deviation 0.624
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Body TemperatureBaseline to Day 21-0.37 degree CelsiusStandard Deviation 0.615
Treatment C: PlaceboChange From Baseline in Body TemperatureBaseline to Day 21-0.24 degree CelsiusStandard Deviation 0.503
Treatment C: PlaceboChange From Baseline in Body TemperatureBaseline to Day 14-0.20 degree CelsiusStandard Deviation 0.411
Treatment C: PlaceboChange From Baseline in Body TemperatureBaseline to Day 3-0.01 degree CelsiusStandard Deviation 0.595
Treatment C: PlaceboChange From Baseline in Body TemperatureBaseline to Day 8-0.11 degree CelsiusStandard Deviation 0.477
Treatment C: PlaceboChange From Baseline in Body TemperatureBaseline to Day 5-0.17 degree CelsiusStandard Deviation 0.65
Secondary

Change From Baseline in Peripheral Capillary Oxygen Saturation

Change from baseline in peripheral capillary oxygen saturation levels was calculated by the investigator.

Time frame: Baseline to Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 30.5 % of SpO2Standard Deviation 2.21
Treatment A: JNJ-53718678 500 mgChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 81.3 % of SpO2Standard Deviation 2.72
Treatment A: JNJ-53718678 500 mgChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 141.2 % of SpO2Standard Deviation 2.1
Treatment A: JNJ-53718678 500 mgChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 211.3 % of SpO2Standard Deviation 3.11
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 211.2 % of SpO2Standard Deviation 2.22
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 30.9 % of SpO2Standard Deviation 1.73
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 140.7 % of SpO2Standard Deviation 1.73
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 80.5 % of SpO2Standard Deviation 1.29
Treatment C: PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 211.1 % of SpO2Standard Deviation 2.21
Treatment C: PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 81.1 % of SpO2Standard Deviation 2.07
Treatment C: PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 141.2 % of SpO2Standard Deviation 2.09
Treatment C: PlaceboChange From Baseline in Peripheral Capillary Oxygen SaturationBaseline to Day 30.2 % of SpO2Standard Deviation 2.44
Secondary

Change From Baseline in Pulse Rate

Change from baseline in pulse rate was calculated and reported by the investigator.

Time frame: Baseline to Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in Pulse RateBaseline to Day 30.0 Beats/minStandard Deviation 10.27
Treatment A: JNJ-53718678 500 mgChange From Baseline in Pulse RateBaseline to Day 8-5.4 Beats/minStandard Deviation 13.17
Treatment A: JNJ-53718678 500 mgChange From Baseline in Pulse RateBaseline to Day 14-4.3 Beats/minStandard Deviation 13.16
Treatment A: JNJ-53718678 500 mgChange From Baseline in Pulse RateBaseline to Day 21-6.9 Beats/minStandard Deviation 9.11
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Pulse RateBaseline to Day 21-6.8 Beats/minStandard Deviation 12.11
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Pulse RateBaseline to Day 3-1.4 Beats/minStandard Deviation 10.17
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Pulse RateBaseline to Day 14-7.4 Beats/minStandard Deviation 13.76
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Pulse RateBaseline to Day 8-3.5 Beats/minStandard Deviation 14.03
Treatment C: PlaceboChange From Baseline in Pulse RateBaseline to Day 21-6.9 Beats/minStandard Deviation 12.85
Treatment C: PlaceboChange From Baseline in Pulse RateBaseline to Day 8-6.4 Beats/minStandard Deviation 11.61
Treatment C: PlaceboChange From Baseline in Pulse RateBaseline to Day 14-5.3 Beats/minStandard Deviation 10.29
Treatment C: PlaceboChange From Baseline in Pulse RateBaseline to Day 30.2 Beats/minStandard Deviation 11.8
Secondary

Change From Baseline in Respiratory Rate

Change from baseline in respiratory rate was calculated and reported by the investigator.

Time frame: Baseline to Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgChange From Baseline in Respiratory RateBaseline to Day 3-0.9 Breaths/minStandard Deviation 2.1
Treatment A: JNJ-53718678 500 mgChange From Baseline in Respiratory RateBaseline to Day 8-1.4 Breaths/minStandard Deviation 2.34
Treatment A: JNJ-53718678 500 mgChange From Baseline in Respiratory RateBaseline to Day 14-1.8 Breaths/minStandard Deviation 2.83
Treatment A: JNJ-53718678 500 mgChange From Baseline in Respiratory RateBaseline to Day 21-1.8 Breaths/minStandard Deviation 2.73
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Respiratory RateBaseline to Day 21-2.4 Breaths/minStandard Deviation 4.34
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Respiratory RateBaseline to Day 3-1.3 Breaths/minStandard Deviation 3.52
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Respiratory RateBaseline to Day 14-1.7 Breaths/minStandard Deviation 3.59
Treatment B: JNJ-53718678 80 mg + PlaceboChange From Baseline in Respiratory RateBaseline to Day 8-0.6 Breaths/minStandard Deviation 4.17
Treatment C: PlaceboChange From Baseline in Respiratory RateBaseline to Day 21-1.8 Breaths/minStandard Deviation 3.33
Treatment C: PlaceboChange From Baseline in Respiratory RateBaseline to Day 8-1.1 Breaths/minStandard Deviation 3.51
Treatment C: PlaceboChange From Baseline in Respiratory RateBaseline to Day 14-1.3 Breaths/minStandard Deviation 3.33
Treatment C: PlaceboChange From Baseline in Respiratory RateBaseline to Day 3-0.8 Breaths/minStandard Deviation 2.25
Secondary

Duration of Signs and Symptoms of RSV Assessed by RI-PRO

Duration of signs and symptoms of RSV infection was assessed by the time to resolution of all RSV symptoms from RI-PRO questionnaire. Resolution was defined as a score of 'Not at all/symptom-free' (score=0) or 'A little bit' (score=1) for at least 24 hours. The RI-PRO questionnaire is a 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items) and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).

Time frame: Baseline up to Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEDIAN)
Treatment A: JNJ-53718678 500 mgDuration of Signs and Symptoms of RSV Assessed by RI-PRO7.9 days
Treatment B: JNJ-53718678 80 mg + PlaceboDuration of Signs and Symptoms of RSV Assessed by RI-PRO7.4 days
Treatment C: PlaceboDuration of Signs and Symptoms of RSV Assessed by RI-PRO15.9 days
Secondary

Maximum Plasma Concentration (Cmax) of JNJ-53718678

Cmax is the maximum plasma concentration of JNJ-53718678 estimated by population PK model.

Time frame: Days 1 and 7

Population: PK analysis set included all participants who received JNJ-53718678 and for whom at least one PK concentration was reported. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgMaximum Plasma Concentration (Cmax) of JNJ-53718678Day 12870 ng/mLStandard Deviation 802
Treatment A: JNJ-53718678 500 mgMaximum Plasma Concentration (Cmax) of JNJ-53718678Day 73540 ng/mLStandard Deviation 1050
Treatment B: JNJ-53718678 80 mg + PlaceboMaximum Plasma Concentration (Cmax) of JNJ-53718678Day 1490 ng/mLStandard Deviation 150
Treatment B: JNJ-53718678 80 mg + PlaceboMaximum Plasma Concentration (Cmax) of JNJ-53718678Day 7552 ng/mLStandard Deviation 131
Secondary

Number of Participants With Adverse Events (AEs) as a Measure of Safety and Tolerability

An adverse event is any untoward medical event that occurs in a participant administered an investigational product, and it does not necessarily indicate only events with clear causal relationship with the relevant investigational product.

Time frame: Up to Day 28

Population: The safety analysis set included all participants who received at least 1 dose of study agent, analyzed as treated.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Treatment A: JNJ-53718678 500 mgNumber of Participants With Adverse Events (AEs) as a Measure of Safety and Tolerability9 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Adverse Events (AEs) as a Measure of Safety and Tolerability18 Participants
Treatment C: PlaceboNumber of Participants With Adverse Events (AEs) as a Measure of Safety and Tolerability15 Participants
Secondary

Number of Participants With Worst Treatment-Emergent Laboratory Abnormalities

Number of participants with worst treatment-emergent laboratory abnormalities (serum chemistry, hematology and urinalyses) were reported based on DMID toxicity grading scale. DMID toxicity grade categorized as Grade 1=mild(mild discomfort (\< 48 hours); no medical intervention/therapy required), Grade 2= moderate (Moderate Mild to moderate limitation in activity - some assistance may be needed; no or minimal medical intervention/therapy required), Grade 3= severe (severe Marked limitation in activity, some assistance usually required; medical intervention/therapy required, hospitalizations possible), and Grade 4=life threatening (extreme limitation in activity, significant assistance required; significant medical intervention/therapy required, hospitalization or hospice care probable).

Time frame: Up to Day 28

Population: The safety analysis set included all participants who received at least 1 dose of study agent, analyzed as treated. Here 'N' (number of participants analyzed) signifies number of participants who were valuable for this outcome measure. Here, n (number analysed) is defined as number of participants analyzed for specified category.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypomagnesemia (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Urine (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Hemoglobin (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 2)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Dipstick Protein (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Aspartate Aminotransferase (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 2)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 2)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypophosphatemia (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 3)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 1)4 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 2)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHypernatremia (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperkalemia (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 1)2 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypoglycemia (Grade 1)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alkaline Phosphatase (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 2)0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperbilirubinemia (Grade 1)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis Urine (Grade 2)1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Renal Function Creatinine (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Dipstick Protein (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypoglycemia (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperkalemia (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypomagnesemia (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypophosphatemia (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHypernatremia (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 1)3 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 2)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Renal Function Creatinine (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Hemoglobin (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 2)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 3)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 2)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 2)3 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Urine (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis Urine (Grade 2)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alkaline Phosphatase (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 2)2 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Aspartate Aminotransferase (Grade 1)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperbilirubinemia (Grade 1)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 1)2 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Aspartate Aminotransferase (Grade 1)2 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Urine (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 2)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperkalemia (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis Urine (Grade 2)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperuricemia (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 1)4 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alkaline Phosphatase (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHypernatremia (Grade 1)2 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperbilirubinemia (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 1)2 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypophosphatemia (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypoglycemia (Grade 1)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 3)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 2)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Alanine Aminotransferase (Grade 2)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 1)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Leukocytes High (Grade 1)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hypomagnesemia (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Coagulation Prothrombin Time (Grade 2)2 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesHematology: Hemoglobin (Grade 1)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Hyperglycemia (Grade 2)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesUrinalysis: Dipstick Protein (Grade 1)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Laboratory AbnormalitiesSerum chemistry: Renal Function Creatinine (Grade 1)0 Participants
Secondary

Number of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) Abnormalities

The number of participants with worst TE ECG abnormalities were reported. The ECG variables that were analyzed included heart rate, PR interval, QRS interval, QT interval, and corrected QT (QTc) interval. Parameters for abnormal ECG findings were QT interval corrected for heart rate (QTc) according to Bazett's formula (QTcB or Borderline Prolonged QTcB) Interval (\[450 milliseconds {ms}, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]), QTc according to Fridericia's formula (QTcF or Borderline Prolonged QTcB) Interval (\[450 ms, 480 ms\], \[480 ms, 500 ms\], and \[more than 500 ms\]).

Time frame: Up to Day 28

Population: The safety analysis set included all participants who received at least 1 dose of study agent, analyzed as treated. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure. Here, 'n' (number analyzed) signifies number of participants who were analyzed for specified categories.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high PR interval1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcF Increase between 30 and 60 ms (Fridericia)3 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcB Increase between 30 and 60 ms (Bazett)3 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally low heart rate0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcF0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcB5 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high QRS interval1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcB Increase between 30 and 60 ms (Bazett)1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally low heart rate1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high PR interval0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high QRS interval0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcF Increase between 30 and 60 ms (Fridericia)0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcB2 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcF1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcF Increase between 30 and 60 ms (Fridericia)1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high PR interval0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcF0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesBorderline prolonged QTcB1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesQTcB Increase between 30 and 60 ms (Bazett)0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally high QRS interval0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent (TE) Electrocardiograms (ECGs) AbnormalitiesAbnormally low heart rate1 Participants
Secondary

Number of Participants With Worst Treatment-Emergent Vital Sign Abnormalities

Number of participants with worst treatment emergent vital sign abnormalities (including Systolic blood pressure \[SBP\] and diastolic blood pressure \[DBP\]) as abnormally low, mild increased, moderate increased and severe increased were reported. SBP: Abnormally low- Less than or equal to (\<=) 50 mmHg, Grade 1 (mild)- 90 mmHg - \< 100 mmHg, Grade 2 (moderate)- greater than or equal to (\>=)100 mmHg to \< 110 mmHg, Grade 3 (severe)- \>=110 mmHg; DBP: Abnormally low- \<=90 mmHg, Grade 1 (mild)- 140 mmHg - \< 160 mmHg, Grade 2 (moderate)- \>=160 mmHg to \< 180 mmHg, Grade 3 (severe)- \>=180 mmHg.

Time frame: Up to Day 28

Population: The safety analysis set included all participants who received at least 1 dose of study agent, analyzed as treated. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased DBP0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased SBP1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low SBP0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low DBP0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesSevere increased SBP1 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased SBP0 Participants
Treatment A: JNJ-53718678 500 mgNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased DBP1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low SBP1 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low DBP0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased DBP3 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased DBP0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased SBP5 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased SBP0 Participants
Treatment B: JNJ-53718678 80 mg + PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesSevere increased SBP0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased SBP3 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesMild increased DBP0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesSevere increased SBP0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased SBP1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low SBP1 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesModerate increased DBP0 Participants
Treatment C: PlaceboNumber of Participants With Worst Treatment-Emergent Vital Sign AbnormalitiesAbnormally low DBP2 Participants
Secondary

Peripheral Capillary Oxygen Saturation (SpO2) Over Time

Peripheral capillary oxygen saturation was measured by the investigator over time.

Time frame: Baseline, Days 3, 8, 14, and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 1497.4 Percentage of SpO2 (%)Standard Deviation 0.99
Treatment A: JNJ-53718678 500 mgPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 897.2 Percentage of SpO2 (%)Standard Deviation 1.69
Treatment A: JNJ-53718678 500 mgPeripheral Capillary Oxygen Saturation (SpO2) Over TimeBaseline95.6 Percentage of SpO2 (%)Standard Deviation 2.72
Treatment A: JNJ-53718678 500 mgPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 395.8 Percentage of SpO2 (%)Standard Deviation 2.62
Treatment A: JNJ-53718678 500 mgPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 2197.1 Percentage of SpO2 (%)Standard Deviation 1.23
Treatment B: JNJ-53718678 80 mg + PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 896.5 Percentage of SpO2 (%)Standard Deviation 2.23
Treatment B: JNJ-53718678 80 mg + PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeBaseline96.0 Percentage of SpO2 (%)Standard Deviation 2.6
Treatment B: JNJ-53718678 80 mg + PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 396.8 Percentage of SpO2 (%)Standard Deviation 2.17
Treatment B: JNJ-53718678 80 mg + PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 1496.6 Percentage of SpO2 (%)Standard Deviation 2.14
Treatment B: JNJ-53718678 80 mg + PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 2197.1 Percentage of SpO2 (%)Standard Deviation 1.47
Treatment C: PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 2196.6 Percentage of SpO2 (%)Standard Deviation 2.41
Treatment C: PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 1496.7 Percentage of SpO2 (%)Standard Deviation 1.81
Treatment C: PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeBaseline95.8 Percentage of SpO2 (%)Standard Deviation 2.74
Treatment C: PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 896.9 Percentage of SpO2 (%)Standard Deviation 2.26
Treatment C: PlaceboPeripheral Capillary Oxygen Saturation (SpO2) Over TimeDay 395.7 Percentage of SpO2 (%)Standard Deviation 3.57
Secondary

Predose Plasma Concentration (Ctrough) of JNJ-53718678

Ctrough is the trough plasma concentration of JNJ-53718678 estimated by population PK model.

Time frame: Predose on Days 1 and 7

Population: PK analysis set included all participants who received JNJ-53718678 and for whom at least one PK concentration was reported. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgPredose Plasma Concentration (Ctrough) of JNJ-53718678Day 1514 nanograms per milliliter (ng/mL)Standard Deviation 249
Treatment A: JNJ-53718678 500 mgPredose Plasma Concentration (Ctrough) of JNJ-53718678Day 7774 nanograms per milliliter (ng/mL)Standard Deviation 451
Treatment B: JNJ-53718678 80 mg + PlaceboPredose Plasma Concentration (Ctrough) of JNJ-53718678Day 168.2 nanograms per milliliter (ng/mL)Standard Deviation 36.2
Treatment B: JNJ-53718678 80 mg + PlaceboPredose Plasma Concentration (Ctrough) of JNJ-53718678Day 784.4 nanograms per milliliter (ng/mL)Standard Deviation 39.4
Secondary

Pulse Rate Over Time

Pulse rate was measured by the investigator over time.

Time frame: Baseline, Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgPulse Rate Over TimeDay 1473.0 Beats/minStandard Deviation 12.62
Treatment A: JNJ-53718678 500 mgPulse Rate Over TimeDay 870.7 Beats/minStandard Deviation 8.22
Treatment A: JNJ-53718678 500 mgPulse Rate Over TimeBaseline76.9 Beats/minStandard Deviation 10.86
Treatment A: JNJ-53718678 500 mgPulse Rate Over TimeDay 376.4 Beats/minStandard Deviation 11.88
Treatment A: JNJ-53718678 500 mgPulse Rate Over TimeDay 2169.4 Beats/minStandard Deviation 7.13
Treatment B: JNJ-53718678 80 mg + PlaceboPulse Rate Over TimeDay 874.5 Beats/minStandard Deviation 12.74
Treatment B: JNJ-53718678 80 mg + PlaceboPulse Rate Over TimeBaseline78.0 Beats/minStandard Deviation 12.16
Treatment B: JNJ-53718678 80 mg + PlaceboPulse Rate Over TimeDay 376.6 Beats/minStandard Deviation 13.2
Treatment B: JNJ-53718678 80 mg + PlaceboPulse Rate Over TimeDay 1471.4 Beats/minStandard Deviation 13.09
Treatment B: JNJ-53718678 80 mg + PlaceboPulse Rate Over TimeDay 2171.9 Beats/minStandard Deviation 9.76
Treatment C: PlaceboPulse Rate Over TimeDay 2171.7 Beats/minStandard Deviation 10
Treatment C: PlaceboPulse Rate Over TimeDay 1473.3 Beats/minStandard Deviation 6.27
Treatment C: PlaceboPulse Rate Over TimeBaseline77.8 Beats/minStandard Deviation 13.05
Treatment C: PlaceboPulse Rate Over TimeDay 871.8 Beats/minStandard Deviation 10.58
Treatment C: PlaceboPulse Rate Over TimeDay 378.7 Beats/minStandard Deviation 15.64
Secondary

Respiratory Rate Over Time

Respiratory rate was measured by the investigator over time.

Time frame: Baseline, Days 3, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgRespiratory Rate Over TimeDay 816.9 Breaths/minStandard Deviation 1.82
Treatment A: JNJ-53718678 500 mgRespiratory Rate Over TimeDay 1416.6 Breaths/minStandard Deviation 2.11
Treatment A: JNJ-53718678 500 mgRespiratory Rate Over TimeDay 317.1 Breaths/minStandard Deviation 2.64
Treatment A: JNJ-53718678 500 mgRespiratory Rate Over TimeBaseline18.2 Breaths/minStandard Deviation 3.55
Treatment A: JNJ-53718678 500 mgRespiratory Rate Over TimeDay 2116.6 Breaths/minStandard Deviation 2.23
Treatment B: JNJ-53718678 80 mg + PlaceboRespiratory Rate Over TimeDay 817.4 Breaths/minStandard Deviation 4.15
Treatment B: JNJ-53718678 80 mg + PlaceboRespiratory Rate Over TimeDay 316.7 Breaths/minStandard Deviation 3.02
Treatment B: JNJ-53718678 80 mg + PlaceboRespiratory Rate Over TimeBaseline18.0 Breaths/minStandard Deviation 3.08
Treatment B: JNJ-53718678 80 mg + PlaceboRespiratory Rate Over TimeDay 1416.4 Breaths/minStandard Deviation 3.1
Treatment B: JNJ-53718678 80 mg + PlaceboRespiratory Rate Over TimeDay 2115.7 Breaths/minStandard Deviation 3.41
Treatment C: PlaceboRespiratory Rate Over TimeDay 2117.6 Breaths/minStandard Deviation 2.82
Treatment C: PlaceboRespiratory Rate Over TimeDay 1418.1 Breaths/minStandard Deviation 2.44
Treatment C: PlaceboRespiratory Rate Over TimeDay 318.3 Breaths/minStandard Deviation 3.06
Treatment C: PlaceboRespiratory Rate Over TimeDay 818.0 Breaths/minStandard Deviation 2.48
Treatment C: PlaceboRespiratory Rate Over TimeBaseline19.2 Breaths/minStandard Deviation 3.52
Secondary

Severity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) Questionnaire

The severity of signs and symptoms of RSV infection was assessed using the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO domain score ranges from 0 (symptom free) to 4 (very severe symptoms). Domain scores were calculated as the arithmetic mean of the scores for items within the domain.

Time frame: Baseline, Days 3, 5, 8, 14 and 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure. Here, 'n' (number analyzed) signifies number of participants who were analyzed at specified timepoints for specified categories.

ArmMeasureGroupValue (MEAN)Dispersion
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Baseline0.97 Scale on a scoreStandard Deviation 1.115
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 140.18 Scale on a scoreStandard Deviation 0.281
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Baseline0.17 Scale on a scoreStandard Deviation 0.398
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 30.77 Scale on a scoreStandard Deviation 0.802
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Baseline2.32 Scale on a scoreStandard Deviation 0.912
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 210.28 Scale on a scoreStandard Deviation 0.607
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 50.46 Scale on a scoreStandard Deviation 0.742
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 210.45 Scale on a scoreStandard Deviation 0.674
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 140.40 Scale on a scoreStandard Deviation 0.494
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 80.13 Scale on a scoreStandard Deviation 0.251
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 51.11 Scale on a scoreStandard Deviation 0.614
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 80.69 Scale on a scoreStandard Deviation 0.579
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 140.07 Scale on a scoreStandard Deviation 0.244
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 31.02 Scale on a scoreStandard Deviation 0.748
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 51.02 Scale on a scoreStandard Deviation 0.542
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 210.00 Scale on a scoreStandard Deviation 0
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Baseline1.46 Scale on a scoreStandard Deviation 1.142
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 31.46 Scale on a scoreStandard Deviation 0.704
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Baseline1.86 Scale on a scoreStandard Deviation 0.804
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 31.84 Scale on a scoreStandard Deviation 0.983
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Baseline1.47 Scale on a scoreStandard Deviation 0.925
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 31.02 Scale on a scoreStandard Deviation 0.828
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 80.20 Scale on a scoreStandard Deviation 0.368
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 210.02 Scale on a scoreStandard Deviation 0.067
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 50.74 Scale on a scoreStandard Deviation 0.813
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 80.88 Scale on a scoreStandard Deviation 0.676
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 140.08 Scale on a scoreStandard Deviation 0.354
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 80.13 Scale on a scoreStandard Deviation 0.274
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 210.17 Scale on a scoreStandard Deviation 0.3
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 80.24 Scale on a scoreStandard Deviation 0.425
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 140.00 Scale on a scoreStandard Deviation 0
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 50.54 Scale on a scoreStandard Deviation 0.429
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 50.40 Scale on a scoreStandard Deviation 0.648
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 210.02 Scale on a scoreStandard Deviation 0.089
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 140.43 Scale on a scoreStandard Deviation 0.561
Treatment A: JNJ-53718678 500 mgSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 30.72 Scale on a scoreStandard Deviation 0.986
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 30.55 Scale on a scoreStandard Deviation 0.435
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Baseline2.16 Scale on a scoreStandard Deviation 0.816
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 31.01 Scale on a scoreStandard Deviation 0.72
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 50.63 Scale on a scoreStandard Deviation 0.591
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 80.45 Scale on a scoreStandard Deviation 0.557
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 140.20 Scale on a scoreStandard Deviation 0.504
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 210.18 Scale on a scoreStandard Deviation 0.532
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Baseline2.02 Scale on a scoreStandard Deviation 1.197
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 30.78 Scale on a scoreStandard Deviation 0.741
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 50.44 Scale on a scoreStandard Deviation 0.485
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 80.22 Scale on a scoreStandard Deviation 0.355
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 140.02 Scale on a scoreStandard Deviation 0.076
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 210.00 Scale on a scoreStandard Deviation 0
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Baseline0.80 Scale on a scoreStandard Deviation 0.847
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 30.26 Scale on a scoreStandard Deviation 0.421
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 50.14 Scale on a scoreStandard Deviation 0.339
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 80.08 Scale on a scoreStandard Deviation 0.296
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 140.04 Scale on a scoreStandard Deviation 0.153
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 210.00 Scale on a scoreStandard Deviation 0
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Baseline1.96 Scale on a scoreStandard Deviation 0.815
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 31.37 Scale on a scoreStandard Deviation 0.75
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 50.95 Scale on a scoreStandard Deviation 0.767
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 80.72 Scale on a scoreStandard Deviation 0.632
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 140.31 Scale on a scoreStandard Deviation 0.566
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 210.32 Scale on a scoreStandard Deviation 0.666
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Baseline0.38 Scale on a scoreStandard Deviation 0.666
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 30.47 Scale on a scoreStandard Deviation 0.712
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 50.36 Scale on a scoreStandard Deviation 0.385
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 80.19 Scale on a scoreStandard Deviation 0.249
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 140.01 Scale on a scoreStandard Deviation 0.057
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 210.00 Scale on a scoreStandard Deviation 0
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Baseline1.50 Scale on a scoreStandard Deviation 0.649
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 50.37 Scale on a scoreStandard Deviation 0.442
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 80.27 Scale on a scoreStandard Deviation 0.296
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 140.10 Scale on a scoreStandard Deviation 0.186
Treatment B: JNJ-53718678 80 mg + PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 210.09 Scale on a scoreStandard Deviation 0.147
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Baseline1.17 Scale on a scoreStandard Deviation 0.821
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 140.36 Scale on a scoreStandard Deviation 0.48
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Baseline0.26 Scale on a scoreStandard Deviation 0.426
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 210.19 Scale on a scoreStandard Deviation 0.388
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 50.61 Scale on a scoreStandard Deviation 0.463
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 30.50 Scale on a scoreStandard Deviation 0.692
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 140.18 Scale on a scoreStandard Deviation 0.393
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 50.94 Scale on a scoreStandard Deviation 0.649
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 50.48 Scale on a scoreStandard Deviation 0.559
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 80.25 Scale on a scoreStandard Deviation 0.417
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Baseline1.91 Scale on a scoreStandard Deviation 0.999
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 80.28 Scale on a scoreStandard Deviation 0.423
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 50.33 Scale on a scoreStandard Deviation 0.471
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 80.36 Scale on a scoreStandard Deviation 0.471
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 140.07 Scale on a scoreStandard Deviation 0.212
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Day 30.67 Scale on a scoreStandard Deviation 0.72
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 31.25 Scale on a scoreStandard Deviation 0.182
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireGastrointestinal: Day 210.17 Scale on a scoreStandard Deviation 0.268
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireThroat: Baseline1.36 Scale on a scoreStandard Deviation 1.186
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 210.27 Scale on a scoreStandard Deviation 0.384
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Baseline1.74 Scale on a scoreStandard Deviation 0.659
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 210.39 Scale on a scoreStandard Deviation 0.529
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Baseline1.34 Scale on a scoreStandard Deviation 0.77
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 31.37 Scale on a scoreStandard Deviation 0.715
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 140.29 Scale on a scoreStandard Deviation 0.406
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 210.48 Scale on a scoreStandard Deviation 0.607
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 51.12 Scale on a scoreStandard Deviation 0.648
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 80.35 Scale on a scoreStandard Deviation 0.629
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 140.38 Scale on a scoreStandard Deviation 0.58
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 80.81 Scale on a scoreStandard Deviation 0.616
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 50.50 Scale on a scoreStandard Deviation 0.798
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireBody/Systemic: Day 30.82 Scale on a scoreStandard Deviation 0.633
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 140.53 Scale on a scoreStandard Deviation 0.599
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireEye: Day 30.65 Scale on a scoreStandard Deviation 0.662
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireNose: Day 80.68 Scale on a scoreStandard Deviation 0.63
Treatment C: PlaceboSeverity of Signs and Symptoms of RSV Assessed by Respiratory Infection-Patient Reported Outcomes (RI-PRO) QuestionnaireChest/Respiratory: Day 210.60 Scale on a scoreStandard Deviation 0.523
Secondary

Time to Resolution of Key RSV Symptoms as Assessed by RI-PRO Questionnaire

Time to resolution of key RSV symptoms (congested or stuffy nose, sore or painful throat, trouble breathing, chest tightness, coughing, coughed up mucus or phlegm, weak or tired) as assessed by RI-PRO questionnaire was reported. Resolution of RSV symptoms was defined as a score of 'Not at all/symptom free' (score = 0) or 'A little bit' (score = 1) for at least 24 hours for symptoms of the RI-PRO questionnaire. The RI-PRO questionnaire is 32-item questionnaire. It summarizes severity of 6 symptom domains: nose (4 items), throat (3 items), eyes (3 items), chest/respiratory (7 items), gastrointestinal (4 items), and body/systemic (11 items). Each RI-PRO score ranges from 0 (symptom-free) to 4 (very severe symptoms).

Time frame: Up to Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection. Here 'N' (number of participants analyzed) signifies number of participants who were evaluable for this outcome measure.

ArmMeasureValue (MEDIAN)
Treatment A: JNJ-53718678 500 mgTime to Resolution of Key RSV Symptoms as Assessed by RI-PRO Questionnaire7.1 Days
Treatment B: JNJ-53718678 80 mg + PlaceboTime to Resolution of Key RSV Symptoms as Assessed by RI-PRO Questionnaire7.6 Days
Treatment C: PlaceboTime to Resolution of Key RSV Symptoms as Assessed by RI-PRO Questionnaire9.6 Days
Secondary

Time to Return to Usual Activity/Health Based on RI-PRO Questionnaire

Time from the first dose of study drug until the time to return to usual activity/health was determined. Return to usual activity/health when the response is 'Yes' on RI-PRO additional question 7 ('Have you returned to your usual activity/health today?') for at least 24 hours.

Time frame: Up to Day 21

Population: The ITT-i population consisted of all randomized participants who received at least 1 dose of study drug and who had a central lab-confirmed RSV infection.

ArmMeasureGroupValue (MEDIAN)Dispersion
Treatment A: JNJ-53718678 500 mgTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual activity6.0 days90% Confidence Interval 2.99
Treatment A: JNJ-53718678 500 mgTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual health8.3 days90% Confidence Interval 5.51
Treatment B: JNJ-53718678 80 mg + PlaceboTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual activity3.0 days90% Confidence Interval 1.39
Treatment B: JNJ-53718678 80 mg + PlaceboTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual health8.6 days90% Confidence Interval 5.57
Treatment C: PlaceboTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual activity5.6 days90% Confidence Interval 4.62
Treatment C: PlaceboTime to Return to Usual Activity/Health Based on RI-PRO QuestionnaireTime to return to usual health9.1 days90% Confidence Interval 5.62

Source: ClinicalTrials.gov · Data processed: Feb 10, 2026