Influenza Clinical Trial
Official title:
A Phase I, Open Label, Randomized Study in Healthy Adults to Compare Safety and Immunogenicity of Different Administration Schedules of Virosomal Influenza Vaccine
The goal of the study is to assess the safety and immune response after vaccination with different doses and vaccination schedules of virosomal influenza vaccine.
Virosomal influenza vaccine is usually administered intramuscularly as a single 0.5 mL dose. The aim of this study is to evaluate the safety and immunogenicity of different doses and vaccination schedules. A total of 84 healthy adults aged 18-50 years will be randomized (1:1:1) into 3 treatment groups: subjects of group 1 will receive a standard dose (0.5 mL) at Days 1, 29, and 57; subjects of group 2 will receive a double dose (1.0 mL) at Day 1 and a standard dose (0.5 mL) at Day 57; subjects of group 3 will receive a triple dose (0.5 mL) at Day 1. Local and systemic solicited adverse events up to Day 4 after each vaccination will be documented. To assess the subjects' humoral and cellular immune response against homologous and heterologous virus strains, blood will be drawn from each participant at baseline (Day 1), at the 4 subsequent monthly visits (Months 1 to 4) and at Month 12. ;
Allocation: Randomized, Endpoint Classification: Safety Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention
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