The high rates come despite efforts in many communities to stem the HIV epidemic through educational programs, condom distribution, and treatment for such sexually transmitted diseases as gonorrhea and syphilis, which create genital sores and ulcers that make it easier for the virus to spread.
Yet this country, with all these advantages, has the highest HIV-infection rate in the world.
The virus has spread extremely rapidly in Botswana.
An added difficulty was that Morris would be asking Ugandans to answer intimate questions about their sexual behavior.
So she replaced the impersonal language of standard questionnaires with a structured conversation.
HIV infection rates range from around 6 percent in Uganda to 39 percent in Swaziland.