Non-transmission of hepatitis B in an institution for the elderly.
D000368:Aged; D000369:Aged, 80 and over; D002170:Canada; D002353:Carrier State; D005260:Female; D006509:Hepatitis B / Q000635:transmission*; D006707:Homes for the Aged; D006801:Humans; D008297:Male; D008875:Middle Aged