Relation between Hong Kong virus and former human A2 isolates and the A-EQU12 virus in human sera collected before 1957.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000818:Animals; D000906:Antibodies / Q000032:analysis*; D001715:Bird Diseases / Q000382:microbiology; D001717:Birds; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D006734:Horse Diseases / Q000382:microbiology; D006736:Horses; D006801:Humans; D007223:Infant; D007251:Influenza, Human / Q000276:immunology* / Q000382:microbiology; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000276:immunology* / Q000302:isolation & purification
D000906:Antibodies