population by the hiv virus was reported only in the areas surrounding kenya's three major cities-- mombasanairobi and kisumu. but in 1990, the picture changed dramatically as rates of infection continued to rise in urban areas and also began climbing in rural areas. ouma: what's happening in the case of aids is that it tends to, um, diffuse, um, hierarchically-- large urban center, second largest urban center, like that. at the same time, you're also finding this contagious diffusion, which is really the spread from the source region-- be it nairobi or mombasa-- outward to the surrounding areas. narrator: in 1993, the rate of new infections was approaching a saturation level, or equal rate of new infection throughout the entire country. as the number of adult aids victims grew, many women passed the disease on to their unborn children. man: that child, she's unfortunate. she was delivered by... delivered by a mother who was positive, and she acquired hiv intrauterine. and then since then, she was growing well, but now she's suffering aids, and from that, now she's suffering from tuberculos