Variola minor in Bragança Paulista County, 1956: lack of evidence indicating the influence of contaminated classrooms on spread of the disease.
D001938:Brazil; D004196:Disease Outbreaks / Q000453:epidemiology*; D006801:Humans; D006920:Hygiene; D008433:Mathematics; D012572:School Health Services; D012899:Smallpox / Q000453:epidemiology*; D013997:Time Factors; D014611:Vaccination