<prompt> Translate the following text to SwahiliScientists say they have found the source of HIV . They traced HIV-1, the virus that has caused most of the AIDS epidemic, to a related virus carried by an African chimpanzee subspecies.  <response>: Wanasayansi wamegundua chanzo cha virusi vya Ukimwi, na kugundua kwamba virusi vya HIV-1 vinavyohusika katika janga la Ukimwi vimetokana na virusi vinavyosambazwa na aina ya chimpanzee wa Afrika. 