[Laboratory study of several epidemic foci of influenza during the years 1967 and 1968].
D000906:Antibodies / Q000032:analysis*; D004197:Disease Reservoirs; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology* / Q000276:immunology*; D012383:Romania; D012621:Seasons
D000906:Antibodies
Studiu de laborator al unor focare epidemice de gripă din anii 1967 şi 1968.