[Influenza epidemic 1971-1972, caused by the A3 virus].
D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D009426:Netherlands; D009975:Orthomyxoviridae / Q000302:isolation & purification
Influenza-epidemie 1971-1972, veroorzaakt door het A3-virus.