Hepatitis B and its ancestors.
D000413:Alaska; D001208:Asia / Q000208:ethnology; D004777:Environment; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology* / Q000635:transmission; D006801:Humans; D007198:Indians, North American; D004930:Inuit; D014171:Transients and Migrants; D014481:United States