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A Phase III, Open-Label, Single-Arm, Multicenter Study to Evaluate the Safety and Immunogenicity of a Trivalent, Surface Antigen Inactivated Subunit Influenza Virus Vaccine Produced in Mammalian Cell Culture (Optaflu®) in Healthy Adults
The present study is designed to confirm the safety and immunogenicity of cell-derived, trivalent, surface antigen, inactivated influenza vaccine in 2 age cohorts: 18 to ≤60 years and ≥61 years and the antibody response to each influenza vaccine antigen, as measured by Single Radial Hemolysis (SRH) or Hemagglutination Inhibition (HI) at approximately 21 days post immunization. The vaccine composition will be based on the WHO-recommended influenza strains for the 2013/2014 Northern Hemisphere vaccine. The results of this study are intended to support the use of this vaccine in future influenza seasons if the recommended vaccine composition remains the same, in compliance with the requirements of the current EU recommendations for clinical trials related to yearly licensing of influenza vaccines.
Details
| Lead sponsor | Novartis Vaccines |
|---|---|
| Phase | Phase 3 |
| Status | COMPLETED |
| Enrolment | 126 |
| Start date | 2013-08 |
| Completion | 2013-09 |
Conditions
- Human Influenza
Interventions
- TIVc
Primary outcomes
- Percentage of Subjects With Single Radial Hemolysis (SRH) Areas ≥25mm2, Against Each of Three Vaccine Strains After Receiving One Dose of TIVc — Day 22 (vaccination is on day 1)
Immunogenicity was assessed in terms of percentages of subjects in both age groups with SRH areas ≥25mm2 against each of the three vaccine strains, three weeks after receiving one dose of TIVc. The related European (CHMP) criterion for the assessment of immunogenicity is met if the percentage of subjects achieving post vaccination SRH areas ≥ 25mm2 is \>70% for adults aged 18 to ≤60 years and \>60% for subjects aged ≥61 years. - Percentages of Subjects With Seroconversion or Significant Increase in SRH Area, Against Each of Three Vaccine Strains After Receiving One Dose of TIVc — Day 22 (vaccination is on day 1)
Immunogenicity was assessed in terms of percentages of subjects in both age groups achieving seroconversion or significant increase by SRH area against each of the three vaccine strains ,three weeks after receiving one dose of TIVc. Seroconversion is defined as percentage of subjects with a pre-vaccination SRH area ≤4mm2 achieving a post-vaccination SRH area ≥25 mm2. Significant increase is defined as percentage of subjects with a pre-vaccination SRH area \>4mm2 achieving at least 50% increase in post-vaccination SRH area. The related European (CHMP) criterion for the assessment of immunogenicity is met if the percentage of subjects achieving post vaccination SRH areas ≥ 25mm2 is \>40% for adults aged 18 to ≤60 years and \>30% for subjects aged ≥61 years. - Geometric Mean Ratio of Post Vaccination Versus Pre Vaccination Geometric Mean Areas (GMAs), After One Dose of TIVc — Day 22/day 1
The antibody responses were evaluated in terms of GMRs of post vaccination GMAs to pre vaccination GMAs against each of the three vaccine strains, three weeks after receiving one dose of TIVc The related European (CHMP) criterion for the assessment of immunogenicity is met if the GMR day 22/day 1 is \>2.5 for adults aged 18 to ≤60 years and \> 2.0 in for subjects aged ≥61 years. - Percentage of Subjects With Haemagglutination Inhibition (HI) Titers ≥40, Against Each of Three Vaccine Strains After Receiving One Dose of TIVc — Day 22 (vaccination is on day 1)
Immunogenicity was assessed in terms of percentages of subjects in both age groups with HI titers ≥40, against each of the three vaccine strains, three weeks after receiving one dose of TIVc. The related European (CHMP) criterion for the assessment of immunogenicity is met if the percentage of subjects achieving HI titers ≥ 40 is \>70% for adults aged 18 to ≤60 years and \>60% for subjects aged ≥61 years. - Percentages of Subjects With Seroconversion or Significant Increase in HI Antibody Titers After Receiving One Dose of TIVc — Day 22 (vaccination is on day 1)
Immunogenicity was assessed in terms of percentages of subjects in both age groups achieving seroconversion or significant increase in HI antibody titers after receiving one dose of TIVc. Seroconversion is defined as percentage of subjects with a pre-vaccination HI titer \<10 to a post-vaccination titer ≥40. Significant increase is defined as percentage of subjects with a pre-vaccination HI titer \>10 to at least a 4-fold increase in post-vaccination HI antibody titers. The related European (CHMP) criterion for the assessment of immunogenicity is met if \>40 % for adults aged 18 to ≤60 years and \>30% for subjects aged ≥61 years achieve seroconversion or significant increase in post-vaccination HI titers. - Geometric Mean Ratio of Post Vaccination Versus Pre Vaccination HI Antibody Titers, Against Each of Three Vaccine Strains After Receiving One Dose of TIVc — Day 22/day 1
The antibody responses following one dose of TIVc were evaluated in terms of GMRs of post vaccination against pre vaccination geometric mean HI titers against each of the three vaccine strains, three weeks after receiving one dose of TIVc. The related European (CHMP) criterion for the assessment of immunogenicity is met if the GMR day 22/day 1 is \>2.5 for adults aged 18 to ≤60 years and \> 2.0 for subjects aged ≥61 years.
Countries
Germany