Influenza and nursing homes.
D000368:Aged; D004196:Disease Outbreaks / Q000453:epidemiology* / Q000517:prevention & control; D004812:Epidemiologic Methods; D006801:Humans; D007252:Influenza Vaccines / Q000276:immunology; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology; D009735:Nursing Homes; D012306:Risk; D014481:United States
D007252:Influenza Vaccines