The epidemiology and prevention of influenza.
D000956:Antigens, Viral / Q000235:genetics*; D014644:Genetic Variation; D006801:Humans; D009980:Influenza A virus / Q000235:genetics* / Q000276:immunology; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D014613:Vaccines, Attenuated
D000956:Antigens, Viral; D007252:Influenza Vaccines; D014613:Vaccines, Attenuated