Influenza B in the spring of 1965.
D000293:Adolescent; D000328:Adult; D000917:Antibody Formation; D000941:Antigens; D002675:Child, Preschool; D004812:Epidemiologic Methods; D005500:Follow-Up Studies; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007252:Influenza Vaccines; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology*; D008875:Middle Aged; D009975:Orthomyxoviridae / Q000302:isolation & purification; D010414:Pennsylvania
D000941:Antigens; D007252:Influenza Vaccines