[Epidemic manifestations of influenza caused by the virus A2-Hong Kong-68 in 1972].
D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D007558:Italy; D009975:Orthomyxoviridae / Q000145:classification / Q000302:isolation & purification*
Manifestazioni epidemiche di influenza da virus A2-Hong Kong-68 nel 1972.