Failure of inactivated influenza vaccine to protect an aged population.
D000368:Aged; D000917:Antibody Formation; D004196:Disease Outbreaks / Q000517:prevention & control; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006707:Homes for the Aged; D006801:Humans; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000276:immunology / Q000517:prevention & control*; D008297:Male; D009975:Orthomyxoviridae / Q000302:isolation & purification; D014611:Vaccination
D007252:Influenza Vaccines