HTLV missionaries and parasites.
D000818:Animals; D002410:Catholicism / Q000266:history; D017977:Deltaretrovirus; D004199:Disease Vectors; D049669:History, 16th Century; D049670:History, 17th Century; D049673:History, 20th Century; D006801:Humans; D007564:Japan; D007938:Leukemia / Q000453:epidemiology / Q000266:history*; D066189:Missionaries; D010272:Parasitic Diseases / Q000453:epidemiology / Q000266:history*; D008921:Religious Missions / Q000266:history