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Clinical Study in Children, 6 Months to 3 Years of Age, to Assess Two Dose Levels of an Experimental Flu Vaccine, Using a Licensed Influenza Virus Vaccine, Vaxigrip® as the Control

Clinical Study in Children, 6 Months to 3 Years of Age, to Assess the Immunogenicity and Safety of Two Dose Levels of Thimerosal-free Fluviral® Vaccine, Using a Licensed Influenza Virus Vaccine, Vaxigrip® as the Control

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00778895
Enrollment
390
Registered
2008-10-24
Start date
2008-11-10
Completion date
2009-08-19
Last updated
2018-08-17

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

Conditions

Influenza

Keywords

Flu, Safety, Immunogenicity, Flu vaccine, Influenza, Virus

Brief summary

Children younger than 5 years of age are at high risk for severe influenza disease (flu) and hospitalization due to flu. Scientists are in the process of re-evaluating the dosing initially based on whole virus vaccines to improve their efficacy in infants. In this study, we will compare two different dose levels of GSK1557482A flu vaccine. Another already approved flu vaccine made by a different company will be used as a control.

Detailed description

This is a study of two different dose levels of a new formulation of flu vaccine for the 2008/2009 flu season using the World Health Organization recommended virus strains. Subjects will be randomly put into one of three different groups to receive either one or two doses of: 0.25 mL dose of the new flu vaccine, or 0.5 mL dose of the new flu vaccine or the licensed Vaxigrip flu vaccine (control) The parents of the subjects and the study doctor and nurses will not know the group of their child until the study is completed. The children will be vaccinated with either one dose or two doses depending on whether or not they have received a flu vaccine before. The doctor will decide on the schedule for each child based on the information provided by the parents. The active phase of the study will last approximately two months for children receiving two doses and one month for those receiving a single dose. An extended safety follow-up will continue until Study Month 6. Two blood samples will be taken from each subject. These will be used to evaluate how well the vaccine works in the children and which dose level works best compared to the control. The parents will fill in a diary card for four days to record any reactions or symptoms which may occur after vaccination. Parents will also keep a record of other symptoms that may occur between vaccinations and up to six months after the first vaccination and will keep a record of any medication their child takes in this time period.

Interventions

BIOLOGICALGSK Biologicals' influenza vaccine GSK1557482A

one IM injection at Day 0 for primed subjects (defined as subjects who had a prior 2-dose priming influenza immunization) or two IM injections at Day 0 and approximately Day 28 for un-primed subjects (defined as subjects who have not previously received a complete 2-dose priming influenza immunization).

BIOLOGICALVaxigrip

one IM injection at Day 0 for primed subjects (defined as subjects who had a prior 2-dose priming influenza immunization) or two IM injections at Day 0 and approximately Day 28 for un-primed subjects (defined as subjects who have not previously received a complete 2-dose priming influenza immunization).

Sponsors

GlaxoSmithKline
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
6 Months to 36 Months
Healthy volunteers
Yes

Inclusion criteria

* A male or female child 6 months to \< 3 years of age at the time of the vaccination, regardless of previous administration of influenza vaccine in a previous season; * Subjects must be in good health established by medical history and physical examination before entering into the study; * Subjects having a parent/guardian who the investigator believes can and will comply with the requirements of the protocol should be enrolled in the study; * Written informed consent obtained from the subject's parent/guardian. * Parents/guardian access to a consistent means of telephone contact, land line or mobile

Exclusion criteria

* Use of any investigational or non-registered product (drug or vaccine) within 30 days preceding the administration of the study vaccine or planned use during the study period. Routine, registered childhood vaccinations are not an exclusion criterion; * History of hypersensitivity to any vaccine; * History of allergy to or reactions likely to be exacerbated by, any component of the vaccine including egg, chicken protein, formaldehyde, or sodium deoxycholate; * History of any congenital, acquired, or iatrogenic immunodeficiency state (current or potential) including HIV infection, disorders of the lymphoid system or bone marrow, or chronic administration (defined as more than 14 consecutive days) of immunosuppressant or other immune-modifying drugs within 3 months prior to the administration of the study vaccine. * Acute disease at the time of enrolment. * History of Guillain Barré syndrome within 6 weeks of receipt of prior inactivated influenza virus vaccine; * Any significant disorder of blood coagulation or treatment with vitamin K antagonists; or any known disorder of hemostasis; * Receipt of any immunoglobulins and/or any blood products within three months of study enrollment or planned administration of any of these products during the study period. * Receipt of a non-study related influenza vaccine outside of this study and during the current (2008-09) influenza immunization campaign. * Any use of analgesics/antipyretics 12 hours before receipt of vaccine.

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationDuring the 4-day follow-up period (Days 0-3) after any vaccinationSolicited local symptoms assessed were pain, redness and swelling. Any was defined as any solicited local symptom reported regardless of intensity grade. Grade 3 pain = Cried when limb was moved/spontaneously painful. Grade 3 redness and swelling were defined as redness/swelling above 50 millimeters (mm). This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationDuring the 4-day follow-up period (Days 0-3) after any vaccinationSymptoms assessed were drowsiness, irritability, loss of appetite and fever. Any was defined as occurrence of any general symptom regardless of their intensity grade or relationship to vaccination. Any fever = Axillary temperature ≥ 38.0 degrees Celsius (°C). Grade 3 fever = Axillary temperature ≥ 39.0°C. For other symptoms, grade 3 was defined as an adverse event which prevented normal everyday activities. Related = A general symptom assessed by the investigator as causally related to vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.
Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationDuring the 28-day follow-up period (Days 0-27) after vaccinationUnsolicited AEs covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any = Occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination. Grade 3 = Occurrence of any unsolicited AE that prevented normal, everyday activities. Related = Occurrence of an unsolicited AE assessed by the investigator to be causally related to study vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.
Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After VaccinationDuring the 28-day post-vaccination periodMAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.
Number of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationDuring the 28-day post-vaccination periodSAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Secondary

MeasureTime frameDescription
Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationDuring the 4-day follow-up period (Days 0-3) after any vaccinationSymptoms assessed were drowsiness, irritability, loss of appetite and fever. Any was defined as occurrence of any general symptom regardless of their intensity grade or relationship to vaccination. Any fever = Axillary temperature ≥ 38.0 degrees Celsius (°C). Grade 3 fever = Axillary temperature ≥ 39.0°C. For other symptoms, grade 3 was defined as an adverse event which prevented normal everyday activities. Related = A general symptom assessed by the investigator as causally related to vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.
Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationDuring the 28-day follow-up period (Days 0-27) after vaccinationUnsolicited AEs covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any = Occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination. Grade 3 = Occurrence of any unsolicited AE that prevented normal, everyday activities. Related = Occurrence of an unsolicited AE assessed by the investigator to be causally related to study vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.
Titers for Serum Hemagglutination Inhibition (HI) AntibodiesAt Day 0 [PRE] and at Day 28 (for primed subjects) and Day 56 (for unprimed subjects) [POST]Titers are presented as geometric mean titers (GMTs). The reference cut-off value was the seropositivity cut-off of 1:10. Antibodies assessed were antibodies against the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida flu strains.
Number of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationDuring the 28-day post-vaccination periodSAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.
Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After VaccinationDuring the 28-day post-vaccination period after vaccinationMAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.
Number of Subjects Seroconverted to HI AntibodiesAt Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer \< 1:10 and a post-vaccination titer ≥1:40, or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.
Number of Subjects Seroprotected Against HI AntibodiesAt Day 0 [PRE] and at Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]A seroprotected subject was defined as a vaccinated subject with serum HI titer ≥ 1:40. The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.
Seroconversion Factor for HI AntibodiesAt Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]The seroconversion factor (SCF) was defined as the fold increase in serum HI geometric mean titers (GMTs) post-vaccination (at Day 28 for primed subjects and at Day 56 for unprimed subjects) compared to pre-vaccination (Day 0). The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.
Number of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationDuring the 4-day follow-up period (Days 0-3) after any vaccinationSolicited local symptoms assessed were pain, redness and swelling. Any was defined as any solicited local symptom reported regardless of intensity grade. Grade 3 pain = Cried when limb was moved/spontaneously painful. Grade 3 redness and swelling were defined as redness/swelling above 50 millimeters (mm). This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Countries

Canada

Participant flow

Recruitment details

Subjects were differentiated according to priming status. Primed Subjects - subjects who had a prior 2-dose priming influenza immunization received a 1-dose vaccination course in the study. Unprimed Subjects - subjects who had not previously received a complete 2-dose priming influenza immunization received a 2-dose vaccination course in the study.

Pre-assignment details

Study comprised an Active phase of approximately 2 months and a post-vaccination 180 day extended safety follow-up period (ESFU phase). 374 subjects out of the 390 who were enrolled in the study were vaccinated. Remaining subjects were not included in the participant flow as started as they failed to meet protocol criteria.

Participants by arm

ArmCount
Fluviral F1 Group
Subjects 6 months to 3 years of age received if primed, 1 dose of formulation 1 of Fluviral vaccine at Day 0 and if unprimed, 2 doses of formulation 1 of Fluviral vaccine at Day 0 and approximately Day 28. The vaccine was administered intramuscularly in the anterolateral part of the thigh (if the subject was less than 12 months) or in the deltoid region of the arm.
164
Fluviral F2 Group
Subjects 6 months to 3 years of age received if primed, 1 dose of formulation 2 of Fluviral vaccine at Day 0 and if unprimed, 2 doses of formulation 1 of Fluviral vaccine at Day 0 and approximately Day 28. The vaccine was administered intramuscularly in the anterolateral part of the thigh (if the subject was less than 12 months) or in the deltoid region of the arm.
167
Vaxigrip Group
Subjects 6 months to 3 years of age received if primed, 1 dose of Vaxigrip vaccine at Day 0 and if unprimed, 2 doses of Vaxigrip vaccine at Day 0 and approximately Day 28. The vaccine was administered intramuscularly in the anterolateral part of the thigh (if the subject was less than 12 months) or in the deltoid region of the arm.
43
Total374

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Active PhaseAdverse Event310
Active PhaseLost to Follow-up110
Active PhaseOther200
Active PhaseWithdrawal by Subject140
ESFU PhaseAdverse Event210
ESFU PhaseLost to Follow-up672
ESFU PhaseOther200
ESFU PhaseWithdrawal by Subject140

Baseline characteristics

CharacteristicFluviral F1 GroupFluviral F2 GroupVaxigrip GroupTotal
Age, Continuous18.2 Years
STANDARD_DEVIATION 9.06
17.5 Years
STANDARD_DEVIATION 8.27
17.0 Years
STANDARD_DEVIATION 8.33
17.7 Years
STANDARD_DEVIATION 8.62
Sex: Female, Male
Female
70 Participants83 Participants26 Participants179 Participants
Sex: Female, Male
Male
94 Participants84 Participants17 Participants195 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —
other
Total, other adverse events
129 / 164138 / 16734 / 43
serious
Total, serious adverse events
2 / 1642 / 1670 / 43

Outcome results

Primary

Number of Subjects With Any and Grade 3 Solicited Local Symptoms After Vaccination

Solicited local symptoms assessed were pain, redness and swelling. Any was defined as any solicited local symptom reported regardless of intensity grade. Grade 3 pain = Cried when limb was moved/spontaneously painful. Grade 3 redness and swelling were defined as redness/swelling above 50 millimeters (mm). This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 4-day follow-up period (Days 0-3) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented and symptom sheet completed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny pain45 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 pain1 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny redness49 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 redness0 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny swelling22 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 swelling0 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny swelling24 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny pain55 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 redness0 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 pain1 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 swelling0 Participants
Fluviral F2 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny redness54 Participants
Primary

Number of Subjects With Any and Related Serious Adverse Events (SAEs) After Vaccination

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 28-day post-vaccination period

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)1 Participants
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Fluviral F2 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)1 Participants
Fluviral F2 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Primary

Number of Subjects With Any and Related Serious Adverse Events (SAEs) After Vaccination

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 6-month safety follow up after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)1 Participants
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Fluviral F2 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)1 Participants
Fluviral F2 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Primary

Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 6-month safety follow up after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination73 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination57 Participants
Primary

Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 28-day post-vaccination period

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination52 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination40 Participants
Primary

Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms After Vaccination

Symptoms assessed were drowsiness, irritability, loss of appetite and fever. Any was defined as occurrence of any general symptom regardless of their intensity grade or relationship to vaccination. Any fever = Axillary temperature ≥ 38.0 degrees Celsius (°C). Grade 3 fever = Axillary temperature ≥ 39.0°C. For other symptoms, grade 3 was defined as an adverse event which prevented normal everyday activities. Related = A general symptom assessed by the investigator as causally related to vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 4-day follow-up period (Days 0-3) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented and symptom sheet completed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny drowsiness54 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 drowsiness3 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated drowsiness44 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny irritability81 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 irritability9 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated irritability62 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny loss of appetite50 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 loss of appetite5 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated loss of appetite37 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny fever16 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 fever4 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated fever10 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 fever1 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny drowsiness65 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny loss of appetite54 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 drowsiness3 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny fever9 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated drowsiness52 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 loss of appetite5 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny irritability83 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated fever6 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 irritability7 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated loss of appetite43 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated irritability69 Participants
Primary

Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After Vaccination

Unsolicited AEs covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any = Occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination. Grade 3 = Occurrence of any unsolicited AE that prevented normal, everyday activities. Related = Occurrence of an unsolicited AE assessed by the investigator to be causally related to study vaccination. This primary outcome measure was assessed for Fluviral F1 Group and Fluviral F2 Group respectively as per the study protocol.

Time frame: During the 28-day follow-up period (Days 0-27) after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationAny unsolicited AE(s)108 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationGrade 3 unsolicited AE(s)19 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationRelated unsolicited AE(s)26 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationAny unsolicited AE(s)112 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationGrade 3 unsolicited AE(s)17 Participants
Fluviral F2 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationRelated unsolicited AE(s)30 Participants
Secondary

Number of Subjects Seroconverted to HI Antibodies

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer \< 1:10 and a post-vaccination titer ≥1:40, or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.

Time frame: At Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all vaccinated and eligible subjects for whom data concerning immunogenicity outcome measures were available and for whom assay results were available for antibodies against at least one study vaccine antigen component after vaccination.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects Seroconverted to HI AntibodiesA/Uruguay (H3N2) [POST]81 Participants
Fluviral F1 GroupNumber of Subjects Seroconverted to HI AntibodiesA/Brisbane (H1N1) [POST]67 Participants
Fluviral F1 GroupNumber of Subjects Seroconverted to HI AntibodiesB/Florida [POST]106 Participants
Fluviral F2 GroupNumber of Subjects Seroconverted to HI AntibodiesA/Uruguay (H3N2) [POST]98 Participants
Fluviral F2 GroupNumber of Subjects Seroconverted to HI AntibodiesA/Brisbane (H1N1) [POST]82 Participants
Fluviral F2 GroupNumber of Subjects Seroconverted to HI AntibodiesB/Florida [POST]114 Participants
Vaxigrip GroupNumber of Subjects Seroconverted to HI AntibodiesA/Brisbane (H1N1) [POST]29 Participants
Vaxigrip GroupNumber of Subjects Seroconverted to HI AntibodiesB/Florida [POST]31 Participants
Vaxigrip GroupNumber of Subjects Seroconverted to HI AntibodiesA/Uruguay (H3N2) [POST]28 Participants
Secondary

Number of Subjects Seroprotected Against HI Antibodies

A seroprotected subject was defined as a vaccinated subject with serum HI titer ≥ 1:40. The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.

Time frame: At Day 0 [PRE] and at Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all vaccinated and eligible subjects for whom data concerning immunogenicity outcome measures were available and for whom assay results were available for antibodies against at least one study vaccine antigen component after vaccination.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [PRE]17 Participants
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [POST]70 Participants
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [PRE]10 Participants
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [POST]82 Participants
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [PRE]17 Participants
Fluviral F1 GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [POST]111 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [POST]122 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [PRE]21 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [POST]99 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [PRE]20 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [POST]84 Participants
Fluviral F2 GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [PRE]23 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [POST]30 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [PRE]3 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [POST]33 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Uruguay (H3N2) [POST]30 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesA/Brisbane (H1N1) [PRE]5 Participants
Vaxigrip GroupNumber of Subjects Seroprotected Against HI AntibodiesB/Florida [PRE]7 Participants
Secondary

Number of Subjects With Any and Grade 3 Solicited Local Symptoms After Vaccination

Solicited local symptoms assessed were pain, redness and swelling. Any was defined as any solicited local symptom reported regardless of intensity grade. Grade 3 pain = Cried when limb was moved/spontaneously painful. Grade 3 redness and swelling were defined as redness/swelling above 50 millimeters (mm). This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 4-day follow-up period (Days 0-3) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented and symptom sheet completed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny pain17 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 pain0 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny redness13 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 redness0 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationAny swelling5 Participants
Fluviral F1 GroupNumber of Subjects With Any and Grade 3 Solicited Local Symptoms After VaccinationGrade 3 swelling0 Participants
Secondary

Number of Subjects With Any and Related Serious Adverse Events (SAEs) After Vaccination

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 6-month safety follow up after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)0 Participants
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Secondary

Number of Subjects With Any and Related Serious Adverse Events (SAEs) After Vaccination

SAEs assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization, result in disability/incapacity or are a congenital anomaly/birth defect in the offspring of a study subject. Any SAE(s) = Occurrence of any SAE(s) regardless of intensity grade or relation to vaccination. Related SAE(s) = Occurrence of any SAE(s) assessed by the investigator as causally related to vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 28-day post-vaccination period

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationAny SAE(s)0 Participants
Fluviral F1 GroupNumber of Subjects With Any and Related Serious Adverse Events (SAEs) After VaccinationRelated SAE(s)0 Participants
Secondary

Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 6-month safety follow up after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination14 Participants
Secondary

Number of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination. Analysis of intensity and relationship to vaccination of MAEs was not performed. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 28-day post-vaccination period after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Medically-attended Adverse Events (MAEs) After Vaccination9 Participants
Secondary

Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms After Vaccination

Symptoms assessed were drowsiness, irritability, loss of appetite and fever. Any was defined as occurrence of any general symptom regardless of their intensity grade or relationship to vaccination. Any fever = Axillary temperature ≥ 38.0 degrees Celsius (°C). Grade 3 fever = Axillary temperature ≥ 39.0°C. For other symptoms, grade 3 was defined as an adverse event which prevented normal everyday activities. Related = A general symptom assessed by the investigator as causally related to vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 4-day follow-up period (Days 0-3) after any vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented and symptom sheet completed.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny drowsiness16 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 drowsiness0 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated drowsiness11 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny irritability22 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 irritability1 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated irritability15 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny loss of appetite14 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 loss of appetite0 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated loss of appetite9 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationAny fever3 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationGrade 3 fever0 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Solicited General Symptoms After VaccinationRelated fever2 Participants
Secondary

Number of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After Vaccination

Unsolicited AEs covers any AE reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any = Occurrence of any unsolicited symptom regardless of intensity grade or relation to vaccination. Grade 3 = Occurrence of any unsolicited AE that prevented normal, everyday activities. Related = Occurrence of an unsolicited AE assessed by the investigator to be causally related to study vaccination. This secondary outcome measure was assessed for the Vaxigrip Group as per the study protocol.

Time frame: During the 28-day follow-up period (Days 0-27) after vaccination

Population: The analysis was performed on the Total Vaccinated cohort which included all subjects with at least one vaccine administration documented.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationAny unsolicited AE(s)24 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationGrade 3 unsolicited AE(s)3 Participants
Fluviral F1 GroupNumber of Subjects With Any, Grade 3 and Related Unsolicited Adverse Events (AEs) After VaccinationRelated unsolicited AE(s)8 Participants
Secondary

Seroconversion Factor for HI Antibodies

The seroconversion factor (SCF) was defined as the fold increase in serum HI geometric mean titers (GMTs) post-vaccination (at Day 28 for primed subjects and at Day 56 for unprimed subjects) compared to pre-vaccination (Day 0). The flu strains assessed were the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida.

Time frame: At Day 28 (for primed subjects) and at Day 56 (for unprimed subjects) [POST]

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all vaccinated and eligible subjects for whom data concerning immunogenicity outcome measures were available and for whom assay results were available for antibodies against at least one study vaccine antigen component after vaccination.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Fluviral F1 GroupSeroconversion Factor for HI AntibodiesA/Uruguay (H3N2) [POST]9.2 fold increase
Fluviral F1 GroupSeroconversion Factor for HI AntibodiesA/Brisbane (H1N1) [POST]6.8 fold increase
Fluviral F1 GroupSeroconversion Factor for HI AntibodiesB/Florida [POST]16.2 fold increase
Fluviral F2 GroupSeroconversion Factor for HI AntibodiesA/Uruguay (H3N2) [POST]9.7 fold increase
Fluviral F2 GroupSeroconversion Factor for HI AntibodiesA/Brisbane (H1N1) [POST]8.3 fold increase
Fluviral F2 GroupSeroconversion Factor for HI AntibodiesB/Florida [POST]20.7 fold increase
Vaxigrip GroupSeroconversion Factor for HI AntibodiesA/Brisbane (H1N1) [POST]14.9 fold increase
Vaxigrip GroupSeroconversion Factor for HI AntibodiesB/Florida [POST]17.6 fold increase
Vaxigrip GroupSeroconversion Factor for HI AntibodiesA/Uruguay (H3N2) [POST]13.3 fold increase
Secondary

Titers for Serum Hemagglutination Inhibition (HI) Antibodies

Titers are presented as geometric mean titers (GMTs). The reference cut-off value was the seropositivity cut-off of 1:10. Antibodies assessed were antibodies against the A/Brisbane (H1N1), A/Uruguay (H3N2) and B/Florida flu strains.

Time frame: At Day 0 [PRE] and at Day 28 (for primed subjects) and Day 56 (for unprimed subjects) [POST]

Population: The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity which included all vaccinated and eligible subjects for whom data concerning immunogenicity outcome measures were available and for whom assay results were available for antibodies against at least one study vaccine antigen component after vaccination.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [PRE]8.3 Titer
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [POST]56.3 Titer
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [PRE]7.0 Titer
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [POST]64.5 Titer
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [PRE]7.9 Titer
Fluviral F1 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [POST]128.7 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [POST]163.7 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [PRE]8.5 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [POST]89.5 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [PRE]7.9 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [POST]70.7 Titer
Fluviral F2 GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [PRE]9.2 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [POST]120.9 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [PRE]7.3 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [POST]190.3 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Uruguay (H3N2) strain [POST]97.8 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesA/Brisbane (H1N1) strain [PRE]8.1 Titer
Vaxigrip GroupTiters for Serum Hemagglutination Inhibition (HI) AntibodiesB/Florida strain [PRE]10.8 Titer

Source: ClinicalTrials.gov · Data processed: Mar 26, 2026