Today is World AIDS Day, and three neighboring countries in southern Africa that have been hard-hit by HIV received remarkably good news.
As part of a massive, first-of-its-kind survey, researchers randomly visited households in Malawi, Zambia, and Zimbabwe and tested about 80,000 people for HIV. In each country, more than 86% of the people receiving antiretroviral treatment had fully suppressed HIV, which means viral levels are so low they are not detectable on standard blood tests. This not only staves off AIDS, but makes it highly unlikely that they will infect others. The rate of new infections has also plummeted by more than 50% in the region since 2003. “We were amazed when we saw this,” says Wafaa El-Sadr, an epidemiologist who heads an international health-strengthening program called ICAP at Columbia University Mailman School of Public Health, which led the survey. “It’s really a credit to these countries—and they’re not the world’s richest places.”