The influence of antigenic variation on influenza A2 epidemics.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000818:Animals; D000906:Antibodies / Q000032:analysis; D000941:Antigens; D002642:Chick Embryo; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D004739:England; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000276:immunology / Q000302:isolation & purification; D014776:Virus Cultivation
D000906:Antibodies; D000941:Antigens