Sex workers and transgender people are among South Africa's most vulnerable populations after the Trump administration slashed U.S. foreign aid and U.S.-funded health clinics dispensing HIV medication shut down. South Africa has more people living with HIV than any other country. Its government has vowed it won’t let the U.S. withdrawal of hundreds of millions of dollars in support collapse the world’s largest HIV program. But some sex workers and others tell The Associated Press they have been turned away from public hospitals or discriminated against as they try to find HIV medication.