John Nkengasong, head of the US President’s Emergency Plan for Aids Relief (Pepfar), has prioritised convincing the US Congress to return to the programme’s traditional five-year reauthorisation. Pepfar, established by former President George W. Bush in 2003, is a crucial funding source for HIV/Aids programmes in countries hardest hit by the epidemic, including South Africa. For 20 years, Pepfar enjoyed broad bipartisan support in Congress, with…