Immunogenicity and Tolerability Study of FluvalAB FL-K-004 Trivalent Influenza Vaccine

Inclusion Criteria: * Adult volunteers in good health aged over 18 years, both sexes; * Full contractual capacity of the participants; * Are in good health (as determined by vital signs and medical history); * Negative urine or serum pregnancy test for females of childbearing potential; * Are able to understand and comply with planned study procedures; * Signed informed consent prior to initiation of study procedures; * Absence of existence of any exclusion criteria. Exclusion Criteria: * Known allergy to eggs or other components of the vaccine; * History of Guillain-Barré syndrome; * Pregnancy or breast feeding or positive pregnancy test prior to vaccination; * Immunosuppressive therapy in the preceding 36 months; * Active neoplasm (i.e. requiring any form of anti-neoplastic therapy); * Concomitant corticosteroid therapy, including inhaled corticosteroids; * Psychiatric illness and/or concomitant psychiatric drug therapy; * Immunoglobulin (or similar blood product) therapy within 3 months prior to vaccination; * Vaccine therapy within 4 weeks prior to the study; * Influenza vaccination within 6 months prior to the study; * Chronic illness that, in the opinion of the investigator, may interfere with the evaluation of the immune response; * Documented HIV, HBV or HCV infection; * Acute febrile respiratory illness within one week prior to vaccination; * Experimental drug therapy within 1 month prior to vaccination; * Alcohol or drug abuse.