Senegal has cut new infections of HIV by almost three-quarters since 2010, leaving it with one of the least-afflicted populations in Africa. 4.3% of people in sub-Saharan Africa are HIV-positive, whereas the prevalence in Senegal is just 0.4%.
Why? Because its HIV prevention and treatment system punches above its weight.
It was the first country in sub-Saharan Africa to start a government-backed programme to treat people with antiretrovirals in 1998, not just prolonging the lives of those with HIV but reducing the chances that they would pass it on. In a bold move in 2003 it made the treatment free, several years before the World Health Organisation recommended that countries do so.
The Economist reports.