Characteristics of influenza virus infections observed in St. Louis from 1943 to 1957; I. Relationship of changes in antigenic composition of influenza viruses to morbidity from influenza.
D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D009975:Orthomyxoviridae; D009976:Orthomyxoviridae Infections
INFLUENZA/epidemiology