title: Influenza vaccine efficacy.
mesh_terms: D000956:Antigens, Viral / Q000276:immunology*; D000939:Epitopes; D006801:Humans; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology*; D007252:Influenza Vaccines / Q000592:standards*
chemical_list: D000956:Antigens, Viral; D000939:Epitopes; D007252:Influenza Vaccines