title: Endemic smallpox in rural East Pakistan. II. Intervillage transmission and infectiousness.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003140:Communicable Disease Control; D004196:Disease Outbreaks; D004197:Disease Reservoirs; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D010154:Pakistan; D012042:Registries; D012111:Residence Characteristics; D012424:Rural Population; D012899:Smallpox / Q000453:epidemiology* / Q000235:genetics / Q000517:prevention & control; D014611:Vaccination; D012901:Variola virus / Q000254:growth & development* / Q000302:isolation & purification; D014774:Virulence