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.

The U.N.'s Angeli Achrekar reports that many clinics have closed, despite exemptions in the policy. She fears mortality will surge.

President Trump's executive action ordering a 90-day pause on foreign development aid threatens the program called the President's Emergency Plan for AIDS Relief. The multimillion-dollar program helps prevent the spread of HIV and AIDS in more than 50 countries.

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.