Influenza vaccination by nasal route in a semi-closed community.
D000281:Administration, Intranasal; D000328:Adult; D000914:Antibodies, Viral / Q000032:analysis; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D007252:Influenza Vaccines / Q000008:administration & dosage*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D012383:Romania; D014611:Vaccination
D000914:Antibodies, Viral; D007252:Influenza Vaccines