South African lab technician Nozipho Mlotshwa was waiting for the test results for a potential HIV vaccine, which has eluded scientists for decades, when the order came from USAID to stop work. The first round of vaccines she and her colleagues made in Johannesburg had produced an immune response in rabbits,

The freeze on U.S. foreign aid ordered by President Donald Trump has effectively halted one of the world's most successful responses to a disease

South African lab technician Nozipho Mlotshwa was waiting for the test results for a potential HIV vaccine, which has eluded scientists for decades, when the order came from USAID to stop work.