HTLV from Africa to Japan.
D000349:Africa; D017977:Deltaretrovirus; D049669:History, 16th Century; D006801:Humans; D007564:Japan; D007938:Leukemia / Q000635:transmission; D009326:Naval Medicine; D012192:Retroviridae Infections / Q000266:history / Q000635:transmission*; D014195:Travel