Skip to content

Convalescent Plasma to Limit SARS-CoV-2 Associated Complications

Comparison of the Efficacy and Safety of Human Coronavirus Immune Plasma (HCIP) vs. Control (SARS-CoV-2 Non-immune) Plasma Among Outpatients With Symptomatic COVID-19

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04373460
Acronym
CSSC-004
Enrollment
1225
Registered
2020-05-04
Start date
2020-06-03
Completion date
2022-12-14
Last updated
2023-06-02

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

Conditions

SARS-CoV 2

Keywords

COVID-19

Brief summary

To assess the efficacy and safety of Human coronavirus immune plasma (HCIP) to reduce the risk of hospitalization or death, the duration of symptoms and duration of nasopharyngeal or oropharyngeal viral shedding.

Detailed description

The purpose of this randomized, double-blind, controlled, phase 2 trial is to evaluate the efficacy of treatment with HCIP in reducing hospitalization and death prior to hospitalization among outpatient adults who have RNA detection test-confirmed COVID-19 AND have developed any symptoms of COVID-19 including but not limited to fever, cough, or other COVID associated symptoms like anosmia. Ambulatory/outpatient adults subjects 18 years of age or older, regardless of risk factors for severe illness may participate. A total of approximately 1344 eligible subjects stratified with a target goal (but not binding) of 50:50 in the \<65 vs ≥ 65 age range will be randomized in a 1:1 ratio to receive either HCIP or control plasma.

Interventions

SARS-CoV-2 convalescent plasma (1 cup; minimum of 175 mL collected by apheresis from a volunteer who recovered from COVID-19 disease and has SARS-CoV-2 antibody titers ≥ 1:320 and after July 2021 meets FDA criteria for high titer plasma.

BIOLOGICALPlasma from a volunteer donor

Plasma collected from a volunteer donor prior to January 1, 2020 will not be tested for SARS-CoV-2 antibodies. Plasma collected after December 31, 2019 will be confirmed as SARS-CoV-2 seronegative.

Sponsors

State of Maryland
CollaboratorOTHER_GOV
Bloomberg Philanthropies
CollaboratorOTHER
United States Department of Defense
CollaboratorFED
National Institute of Allergy and Infectious Diseases (NIAID)
CollaboratorNIH
National Center for Advancing Translational Sciences (NCATS)
CollaboratorNIH
Johns Hopkins University
Lead SponsorOTHER

Study design

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

Intervention model description

A total of approximately 1344 eligible subjects stratified with a target goal (but not binding) of 50:50 in the \<65 vs ≥ 65 age range will be randomized in a 1:1 ratio to receive either HCIP or control plasma.

Eligibility

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

Inclusion criteria

* ≥ 18 years of age * Competent and capable to provide informed consent * • Positive molecular test for presence of SARS-CoV-2 in fluid collected by saliva for antigen, oropharyngeal or nasopharyngeal swab * Experiencing any symptoms of COVID-19 including but not limited to fever(T\> 100.5º F), cough, or other COVID associated symptoms like anosmia * ≤ 8 days since the first symptoms of COVID-19 * ≤ 8 days since first positive SARS-CoV-2 RNA test * Able and willing to comply with protocol requirements listed in the informed consent

Exclusion criteria

* Hospitalized or expected to be hospitalized within 24 hours of enrollment * Psychiatric or cognitive illness or recreational drug/alcohol use that in the opinion of the principal investigator, would affect subject safety and/or compliance * History of prior reactions to transfusion blood products * Inability to complete therapy with the study product within 24 hours after enrollment * Receiving any treatment drug for COVID-19 within 14 days prior to screening evaluation (monoclonal antibodies, compassionate use or study trial related). Steroid treatment at any time does not affect study eligibility

Design outcomes

Primary

MeasureTime frameDescription
Cumulative Number of Hospitalizations or Deaths Prior to HospitalizationUp to day 28Cumulative Number measured as the proportion of subjects who were hospitalized or who died prior to hospitalization
Cumulative Incidence of Severe Infusion ReactionsUp to day 28Cumulative incidence measured as rate per person-years experiencing treatment-related severe infusion reactions during the study period.
Cumulative Incidence of Treatment-related Grade 3 or Higher Adverse EventsUp to day 90Cumulative incidence measured as rate per person-years experiencing a Grade 3 or higher.
Cumulative Incidence of Treatment-related Acute Respiratory Distress Syndrome (ARDS)Up to day 28Cumulative incidence measured as rate per person-years of treatment-related severe Acute Respiratory Distress Syndrome (ARDS) during the study period.

Secondary

MeasureTime frameDescription
Serum SARS-CoV-2 Antibody Titers by VisitDays 0, 14, 28 and 90Geometric mean Spike Receptor Binding Domain (RBD) titers at day 0, 14, 28 and 90 between the randomized arms.

Other

MeasureTime frameDescription
Number of Participants With Resolved COVID-19 Symptoms at Day 90Day 90Number of participants with resolved COVID-19 symptoms at day 90
Number of Participants With ICU AdmissionUp to day 90Disease severity measured by admission to the ICU
Impact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma RecipientsDay 0 to Day28Impact of donor antibody titers (high/low) will be assessed by hospitalization rate as measured by number of hospitalizations.
Impact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateDay 0 to Day 90Assess change in hospitalization rate as measured by number of hospitalizations stratified by age groups \<65 and \>=65
Number of Participants With Invasive Mechanical VentilationUp to day 90Disease severity measured by invasive mechanical ventilation
Number of Participants Who DiedUp to day 90Disease severity measured by death
Number of Participants With Resolved COVID-19 Symptoms at Day 14Day 14Number of participants with resolved COVID-19 symptoms at day 14
Number of Participants With Resolved COVID-19 Symptoms at Day 28Day 28Number of participants with resolved COVID-19 symptoms at day 28

Countries

United States

Participant flow

Participants by arm

ArmCount
SARS-CoV-2 Convalescent Plasma
SARS-CoV-2 convalescent plasma (1 cup; minimum of 175 mL collected by apheresis from a volunteer who recovered from COVID-19 disease and has SARS-CoV-2 antibody titers ≥ 1:320 and after July 2021 meets FDA criteria for high titer plasma. SARS-CoV-2 convalescent plasma: SARS-CoV-2 convalescent plasma (1 cup; minimum of 175 mL collected by apheresis from a volunteer who recovered from COVID-19 disease and has SARS-CoV-2 antibody titers ≥ 1:320 and after July 2021 meets FDA criteria for high titer plasma.
592
Standard Control Plasma
Plasma collected from a volunteer donor prior to January 1, 2020 will not be tested for SARS-CoV-2 antibodies. Plasma collected after December 31, 2019 will be confirmed as SARS-CoV-2 seronegative. Plasma from a volunteer donor: Plasma collected from a volunteer donor prior to January 1, 2020 will not be tested for SARS-CoV-2 antibodies. Plasma collected after December 31, 2019 will be confirmed as SARS-CoV-2 seronegative.
589
Total1,181

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyDid not receive tranfusion1826

Baseline characteristics

CharacteristicSARS-CoV-2 Convalescent PlasmaStandard Control PlasmaTotal
Age, Continuous42 years44 years43 years
Age, Customized
18 - 34 years
190 Participants165 Participants355 Participants
Age, Customized
35 - 49 years
207 Participants208 Participants415 Participants
Age, Customized
50 - 64 years
155 Participants176 Participants331 Participants
Age, Customized
>=65 years
40 Participants40 Participants80 Participants
Asthma
No
533 Participants516 Participants1049 Participants
Asthma
Yes
59 Participants73 Participants132 Participants
BMI category 1
<30
382 Participants355 Participants737 Participants
BMI category 1
>=30
210 Participants234 Participants444 Participants
BMI category 2
<35
495 Participants482 Participants977 Participants
BMI category 2
>=35
97 Participants107 Participants204 Participants
Diabetes
No
543 Participants539 Participants1082 Participants
Diabetes
Yes
49 Participants50 Participants99 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
80 Participants90 Participants170 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
512 Participants499 Participants1011 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
HIV infection
No
579 Participants577 Participants1156 Participants
HIV infection
Yes
13 Participants12 Participants25 Participants
Hypertension
No
452 Participants453 Participants905 Participants
Hypertension
Yes
140 Participants136 Participants276 Participants
Pregnant
No
590 Participants588 Participants1178 Participants
Pregnant
Yes
2 Participants1 Participants3 Participants
Race (NIH/OMB)
American Indian or Alaska Native
8 Participants9 Participants17 Participants
Race (NIH/OMB)
Asian
22 Participants22 Participants44 Participants
Race (NIH/OMB)
Black or African American
92 Participants71 Participants163 Participants
Race (NIH/OMB)
More than one race
9 Participants10 Participants19 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
2 Participants2 Participants4 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
459 Participants475 Participants934 Participants
Sex: Female, Male
Female
323 Participants352 Participants675 Participants
Sex: Female, Male
Male
269 Participants237 Participants506 Participants
Time from symptom onset to transfusion6 days6 days6 days
Vaccine status
Fully vaccinated
79 Participants79 Participants158 Participants
Vaccine status
Partially vaccinated
27 Participants31 Participants58 Participants
Vaccine status
Unvaccinated
486 Participants479 Participants965 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 5923 / 589
other
Total, other adverse events
106 / 592109 / 589
serious
Total, serious adverse events
34 / 59255 / 589

Outcome results

Primary

Cumulative Incidence of Severe Infusion Reactions

Cumulative incidence measured as rate per person-years experiencing treatment-related severe infusion reactions during the study period.

Time frame: Up to day 28

Population: Includes patients who were randomized and received transfusion

ArmMeasureValue (NUMBER)
SARS-CoV-2 Convalescent PlasmaCumulative Incidence of Severe Infusion Reactions0.05 Rate per person-years
Standard Control PlasmaCumulative Incidence of Severe Infusion Reactions0.00 Rate per person-years
p-value: 0.1695% CI: [-0.11, 0.02]Rate per person-years
Primary

Cumulative Incidence of Treatment-related Acute Respiratory Distress Syndrome (ARDS)

Cumulative incidence measured as rate per person-years of treatment-related severe Acute Respiratory Distress Syndrome (ARDS) during the study period.

Time frame: Up to day 28

Population: Includes patients who were randomized and received transfusion

ArmMeasureValue (NUMBER)
SARS-CoV-2 Convalescent PlasmaCumulative Incidence of Treatment-related Acute Respiratory Distress Syndrome (ARDS)0.00 Rate per person-years
Standard Control PlasmaCumulative Incidence of Treatment-related Acute Respiratory Distress Syndrome (ARDS)0.01 Rate per person-years
p-value: 0.3295% CI: [-0.01, 0.02]Rate per person-years
Primary

Cumulative Incidence of Treatment-related Grade 3 or Higher Adverse Events

Cumulative incidence measured as rate per person-years experiencing a Grade 3 or higher.

Time frame: Up to day 90

ArmMeasureValue (NUMBER)
SARS-CoV-2 Convalescent PlasmaCumulative Incidence of Treatment-related Grade 3 or Higher Adverse Events0.25 Rate per person-years
Standard Control PlasmaCumulative Incidence of Treatment-related Grade 3 or Higher Adverse Events0.43 Rate per person-years
p-value: 0.0295% CI: [0.03, 0.32]Rate per person-years
Primary

Cumulative Number of Hospitalizations or Deaths Prior to Hospitalization

Cumulative Number measured as the proportion of subjects who were hospitalized or who died prior to hospitalization

Time frame: Up to day 28

Population: Includes patients who were randomized and received transfusion

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaCumulative Number of Hospitalizations or Deaths Prior to Hospitalization17 Participants
Standard Control PlasmaCumulative Number of Hospitalizations or Deaths Prior to Hospitalization37 Participants
p-value: 0.00595% CI: [1, 5.8]Fisher Exact
Secondary

Serum SARS-CoV-2 Antibody Titers by Visit

Geometric mean Spike Receptor Binding Domain (RBD) titers at day 0, 14, 28 and 90 between the randomized arms.

Time frame: Days 0, 14, 28 and 90

Population: Analysis limited to those that were transfused and had the titer data performed

ArmMeasureGroupValue (GEOMETRIC_MEAN)
SARS-CoV-2 Convalescent PlasmaSerum SARS-CoV-2 Antibody Titers by VisitPre-transfusion345 Spike Receptor Binding Domain Titer
SARS-CoV-2 Convalescent PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 148595 Spike Receptor Binding Domain Titer
SARS-CoV-2 Convalescent PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 2810980 Spike Receptor Binding Domain Titer
SARS-CoV-2 Convalescent PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 9013958 Spike Receptor Binding Domain Titer
Standard Control PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 9013281 Spike Receptor Binding Domain Titer
Standard Control PlasmaSerum SARS-CoV-2 Antibody Titers by VisitPre-transfusion316 Spike Receptor Binding Domain Titer
Standard Control PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 2812241 Spike Receptor Binding Domain Titer
Standard Control PlasmaSerum SARS-CoV-2 Antibody Titers by VisitDay 149868 Spike Receptor Binding Domain Titer
Other Pre-specified

Impact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization Rate

Assess change in hospitalization rate as measured by number of hospitalizations stratified by age groups \<65 and \>=65

Time frame: Day 0 to Day 90

Population: Includes patients who were randomized and received transfusion

ArmMeasureGroupCategoryValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group < 65Primary event of hospitalization12 Participants
SARS-CoV-2 Convalescent PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group < 65No primary event of hospitalization540 Participants
SARS-CoV-2 Convalescent PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group >= 65Primary event of hospitalization5 Participants
SARS-CoV-2 Convalescent PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group >= 65No primary event of hospitalization35 Participants
Standard Control PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group >= 65No primary event of hospitalization32 Participants
Standard Control PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group < 65Primary event of hospitalization29 Participants
Standard Control PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group >= 65Primary event of hospitalization8 Participants
Standard Control PlasmaImpact of Convalescent Plasma on Outcome as Assessed by Change in Hospitalization RateAge group < 65No primary event of hospitalization520 Participants
Other Pre-specified

Impact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma Recipients

Impact of donor antibody titers (high/low) will be assessed by hospitalization rate as measured by number of hospitalizations.

Time frame: Day 0 to Day28

Population: Analysis limited to those that had the donor titer measured

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaImpact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma RecipientsHospitalized6 Participants
SARS-CoV-2 Convalescent PlasmaImpact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma RecipientsNot hospitalized296 Participants
Standard Control PlasmaImpact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma RecipientsHospitalized10 Participants
Standard Control PlasmaImpact of Donor Antibody Titers on Hospitalization Rate of Convalescent Plasma RecipientsNot hospitalized254 Participants
95% CI: [0.192, 1.425]
Other Pre-specified

Number of Participants Who Died

Disease severity measured by death

Time frame: Up to day 90

Population: Includes patients who were randomized and received transfusion

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants Who DiedDeaths0 Participants
SARS-CoV-2 Convalescent PlasmaNumber of Participants Who DiedNo deaths592 Participants
Standard Control PlasmaNumber of Participants Who DiedDeaths3 Participants
Standard Control PlasmaNumber of Participants Who DiedNo deaths586 Participants
Other Pre-specified

Number of Participants With ICU Admission

Disease severity measured by admission to the ICU

Time frame: Up to day 90

Population: Includes patients who were randomized and received transfusion

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants With ICU AdmissionAdmission to ICU3 Participants
SARS-CoV-2 Convalescent PlasmaNumber of Participants With ICU AdmissionNo admission to ICU589 Participants
Standard Control PlasmaNumber of Participants With ICU AdmissionAdmission to ICU7 Participants
Standard Control PlasmaNumber of Participants With ICU AdmissionNo admission to ICU582 Participants
Other Pre-specified

Number of Participants With Invasive Mechanical Ventilation

Disease severity measured by invasive mechanical ventilation

Time frame: Up to day 90

ArmMeasureCategoryValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants With Invasive Mechanical VentilationOn invasive mechanical ventilation0 Participants
SARS-CoV-2 Convalescent PlasmaNumber of Participants With Invasive Mechanical VentilationNo invasive mechanical ventilation592 Participants
Standard Control PlasmaNumber of Participants With Invasive Mechanical VentilationOn invasive mechanical ventilation3 Participants
Standard Control PlasmaNumber of Participants With Invasive Mechanical VentilationNo invasive mechanical ventilation586 Participants
Other Pre-specified

Number of Participants With Resolved COVID-19 Symptoms at Day 14

Number of participants with resolved COVID-19 symptoms at day 14

Time frame: Day 14

Population: All participants who were transfused and had symptom data for day 14

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 14146 Participants
Standard Control PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 14134 Participants
p-value: 0.65Fisher Exact
Other Pre-specified

Number of Participants With Resolved COVID-19 Symptoms at Day 28

Number of participants with resolved COVID-19 symptoms at day 28

Time frame: Day 28

Population: All participants who were transfused and had symptom data for day 28

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 28250 Participants
Standard Control PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 28245 Participants
Other Pre-specified

Number of Participants With Resolved COVID-19 Symptoms at Day 90

Number of participants with resolved COVID-19 symptoms at day 90

Time frame: Day 90

Population: All participants who were transfused and had symptom data for day 90

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
SARS-CoV-2 Convalescent PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 90359 Participants
Standard Control PlasmaNumber of Participants With Resolved COVID-19 Symptoms at Day 90347 Participants

Source: ClinicalTrials.gov · Data processed: Feb 23, 2026