Influenza in a partially immunized aged population. Effectiveness of killed Hong Kong vaccine against infection with the England strain.
D000367:Age Factors; D000368:Aged; D000914:Antibodies, Viral / Q000032:analysis; D004196:Disease Outbreaks; D006707:Homes for the Aged; D006801:Humans; D007252:Influenza Vaccines / Q000008:administration & dosage* / Q000627:therapeutic use; D007251:Influenza, Human / Q000276:immunology* / Q000401:mortality / Q000517:prevention & control; D007273:Injections, Intramuscular; D009975:Orthomyxoviridae / Q000302:isolation & purification
D000914:Antibodies, Viral; D007252:Influenza Vaccines