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. 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. For two decades, the American people have paid for the President's Emergency Plan for AIDS Relief,

Scientists believe they are on the cusp of a vaccine for HIV. Two promising vaccines were set to go to additional trials. But the vials of vaccines are in the freezer due to financial cuts by the Trump administration.

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.