Influenza.
D000906:Antibodies; D001208:Asia; D004196:Disease Outbreaks; D006385:Hemagglutination Inhibition Tests; D006723:Hong Kong; D006801:Humans; D007251:Influenza, Human / Q000175:diagnosis / Q000453:epidemiology* / Q000382:microbiology; D009975:Orthomyxoviridae / Q000276:immunology / Q000302:isolation & purification; D012698:Serologic Tests; D014481:United States; D014611:Vaccination; D014765:Viral Vaccines
D000906:Antibodies; D014765:Viral Vaccines