title: Epidemiology of smallpox in West Pakistan. I. Acquired immunity and the distribution of disease.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D005260:Female; D006801:Humans; D007110:Immunity, Active; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D009790:Occupations; D010154:Pakistan; D012899:Smallpox / Q000453:epidemiology* / Q000276:immunology / Q000517:prevention & control; D012900:Smallpox Vaccine; D012959:Socioeconomic Factors; D014611:Vaccination; D014887:Weather
chemical_list: D012900:Smallpox Vaccine