Immunity to influenza.
D000914:Antibodies, Viral / Q000032:analysis; D004196:Disease Outbreaks; D004739:England; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007109:Immunity; D007070:Immunoglobulin A / Q000032:analysis; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000276:immunology*; D009093:Mucus / Q000276:immunology; D009439:Neuraminidase / Q000032:analysis; D014481:United States
D000914:Antibodies, Viral; D007070:Immunoglobulin A; D007252:Influenza Vaccines; D009439:Neuraminidase