The Origin of AIDS Crossed the species barrier into humans in Africa in the 1930s Patient who died in 1959 in Congo is the oldest known case Spread in Africa as a result of urbanization Spread in world through modern transportation and unsafe sexual practices Norwegian sailor who died in 1976 is the first known case in Western world • Crossed the species barrier into humans in Africa in the 1930s • Patient who died in 1959 in Congo is the oldest known case • Spread in Africa as a result of urbanization • Spread in world through modern transportation and unsafe sexual practices • Norwegian sailor who died in 1976 is the first known case in Western world The Origin of AIDS