[Epidemiological and electron optical studies of influenza virus A2-Hong Kong].
D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology*; D008854:Microscopy, Electron; D009975:Orthomyxoviridae / Q000254:growth & development / Q000302:isolation & purification; D012463:Saliva / Q000382:microbiology; D013557:Switzerland
Epidemiologische und elektronenoptische Untersuchungen über das Influenzavirus A2-Hongkong.