Inactivated Split Virus Seasonal Influenza Vaccine (Vero Cell-Derived)

Inclusion Criteria: * Participant is 18 to 49 years of age, inclusive, at the time of screening (for Cohort 18 to 49 years of age); * Participant is 50 years of age, inclusive, or older at the time of screening (for Cohort 50 years of age or older); * Participant gave written informed consent prior to study entry * Participant is generally healthy without any significant medical risk conditions, as determined by the Investigator's clinical judgment through collection of medical history and performance of a physical examination; * Participant is willing and able to comply with the requirements of the protocol; * Participant agrees to keep a record of symptoms for the duration of the study; * If female and capable of bearing children - participant has a negative urine pregnancy test at the study site, within 36 hours prior to vaccination, and agrees to employ adequate birth control measures for the duration of the study. For the purposes of this study adequate birth control measures incorporate one of the following FDA approved birth control measures for the duration of the study: * Hormonal types of birth control (such as implants, birth control pills, patches or other methods) or an intrauterine device, OR * A barrier type of birth control measure (i.e., condoms, diaphragms, cervical caps, etc.). Exclusion Criteria: * Participant has been vaccinated with seasonal trivalent influenza vaccine in the current season; * Participant has an oral temperature of ≥100.4°F (≥38.…