Variola minor in Bragança Paulista County, 1956: space-time interactions among variola minor cases in two elementary schools.
D001938:Brazil; D002648:Child; D004196:Disease Outbreaks / Q000453:epidemiology*; D004812:Epidemiologic Methods; D006801:Humans; D007109:Immunity; D011336:Probability; D012572:School Health Services; D012899:Smallpox / Q000453:epidemiology* / Q000276:immunology; D013223:Statistics as Topic; D013997:Time Factors