An outbreak of influenza A2 in a population with a known antibody profile.
D000328:Adult; D000937:Antigen-Antibody Reactions; D003168:Complement Fixation Tests; D003604:Czechoslovakia; D004196:Disease Outbreaks; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology / Q000276:immunology*; D008297:Male; D008887:Military Medicine; D011159:Population Surveillance