Spread of variola minor among vaccinated members of a household.
D000293:Adolescent; D000328:Adult; D002648:Child; D003168:Complement Fixation Tests; D004197:Disease Reservoirs; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D012899:Smallpox / Q000175:diagnosis / Q000235:genetics* / Q000517:prevention & control; D013997:Time Factors; D014611:Vaccination