[Pandemic influenza in 1957 and certain epidemiological and virological characteristics of influenza in Leningrad].
D006801:Humans; D007251:Influenza, Human / Q000150:complications*; D058873:Pandemics
INFLUENZA/complications
Pandemiia grippa v 1957 g. nekotorye epidemiologicheskie i virusologicheskie osobennosti grippa v Leningrade.