Four of seven sub-Saharan African countries followed by researchers over the last year and a half now can track the effectiveness of HIV treatment among all patients receiving it with tests to measure the levels of virus in their bodies at least once a year, according to an update in last week’s Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report. Across those four countries — Namibia, South Africa, Kenya, and Côte d’Ivoire — and the other three — Malawi, Tanzania and Uganda — a total of 62 laboratories were enrolled to carry out the viral load testing from January 2015 to June 2016 and all countries increased the numbers of people living with HIV whose viral load was measured.