In Botswana, an intervention in 15 communities to test for and treat HIV infection in all adult residents was effective in increasing population viral suppression to very high levels (meaning that the virus becomes undetectable and can't be transmitted while patients are taking effective treatment), according to a new study led by researchers from Harvard T.H. Chan School of Public Health and the Botswana-Harvard AIDS Institute Partnership, and collaborators at several other institutions. The intervention likely also contributed to a nearly one-third reduction in the incidence of HIV infection in participating communities.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/new-hiv-program-increased-viral-suppression-decreased-new-infections-in-botswana