Safety and Tolerability of a Cell-Derived Influenza Vaccine in Healthy Adults Aged ≥18 Years and ≤ 49 Years

Inclusion Criteria: * Healthy female or male subjects aged ≧18 and ≦49 years * Willing and able to give informed consent Exclusion Criteria: * Influenza vaccination of laboratory confirmed influenza infection within six months of informed consent, * presence of any significant medical condition, * a serious adverse reaction after a previous (influenza) vaccination, * underlying medical conditions for which annual influenza vaccine is recommended by the Advisory Committee on Immunization Practices (ACIP), * chronic diseases requiring long-term immunosuppressive therapy