Study to Evaluate Safety and Immunogenicity of Sub-unit Adjuvanted Influenza Vaccine Administered to Elderly Subjects, Formulation 2011-2012
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Prevention
|Official Title:||A Phase II, Open Label, Uncontrolled, Multi Center Study to Evaluate Safety and Immunogenicity of a Surface Antigen, Inactivated, Adjuvanted With MF59C.1 Influenza Vaccine, Formulation 2011-2012, When Administered to Elderly Subjects|
- Percentage of Participants Who Achieved Seroconversion or Significant Increase in Single Radial Hemolysis (SRH) Area Against Each of Three Vaccine Strains After One Vaccination of FLUAD [ Time Frame: day 22 ]
Immunogenicity was measured as the percentage of participants who achieved seroconversion or significant increase in single radial hemolysis (SRH) area, against each of the three vaccine strains, three weeks after vaccination (day 22), evaluated using SRH assay.
Seroconversion: proportion of participants with negative pre-vaccination serum and a post-vaccination serum area ≥ 25 mm2. Significant increase: proportion of participants with at least a 50% increase in area from positive pre-vaccination serum. Seroconversion or significant increase: proportion of participants with either seroconversion or significant increase.
The European (Committee for Medicinal Products for Human Use [CHMP]) criterion is met, if percentage of participants achieving seroconversion or significant increase in SRH area is 30% (≥65 years).
- Geometric Mean Ratio of Participants Against Each of the Three Vaccine Strains After One Vaccination of FLUAD [ Time Frame: day 22 ]
Geometric mean ratio (GMR) of participants was calculated as the ratio of post-vaccination to pre-vaccination SRH geometric mean areas (GMAs), directed against each of the three vaccine strains, three weeks after FLUAD vaccination (day 22).
The CHMP criterion was met if the geometric mean increase (GMR, day 22/day 1) in SRH antibody area is >2.0 (≥65 years).
- Percentage of Participants Who Achieved SRH Area ≥25mm2 Against Each of the Three Vaccine Strains After One Vaccination of FLUAD [ Time Frame: day 22 ]
Immunogenicity was measured as the percentage of participants achieving SRH area ≥25 mm2 against each of the three vaccine strains at baseline (day 1) and three weeks after FLUAD vaccination (day 22).
This criterion is met according to CHMP guideline if percentage of participants achieving SRH area ≥25 mm2 is 60% (≥65 years).
- Number of Participants Who Reported Solicited Local and Systemic Reactions [ Time Frame: 1 to 4 days post-vaccination ]Safety was assessed for participants who reported solicited local and systemic reactions from day 1 up to and including day 4 after the FLUAD vaccination.
|Study Start Date:||May 2011|
|Study Completion Date:||June 2011|
|Primary Completion Date:||June 2011 (Final data collection date for primary outcome measure)|
Sub unit, Inactivated, MF59C.1 Adjuvanted Influenza Vaccine
No comparator is administered, only one IM single dose of trivalent subunit inactivated influenza vaccine is administered during the vaccination visit
Biological: Seasonal Influenza Vaccine
This phase II is performed as a multicenter study in elderly subjects. Enrolled subjects received one single IM dose of trivalent subunit inactivated adjuvanted flu vaccine during the vaccination visit, according to the study protocol (follow-up period: until day 22) .
Please refer to this study by its ClinicalTrials.gov identifier: NCT01344057
|Dipartimento di Medicina e Scienze dell'Invecchiamento, Università G. D'Annunzio|
|Via dei Vestini, Chieti, Italy, 66100|
|Department of "Scienze della Salute" University of Genova Via Pastore 1|
|Genova, Italy, 16132|
|Satellite: "ASL Lanciano - Vasto", sede legale Via S Spaventa 37|
|Lanciano, Italy, 66034|
|Satellite: "Distretto Sanitario di Base di Fossacesia" in Via Polidoro-Vasto|
|Vaccine and Immunotherapy Research Center Department of Infectious and Tropical Diseases San Raffaele Scientific Institute Via Stamira d'Ancona 20|
|Milano, Italy, 20127|
|Department of "malattie infettive" Ospedale San Gerardo, via Pergolesi 33|
|Monza, Italy, 20052|