WASHINGTON (Reuters) - President Donald Trump has vowed to destroy Mexican cartels and end the U.S. fentanyl epidemic, but his sweeping freeze on foreign aid has temporarily stopped U.S.-funded anti-narcotics programs in Mexico that for years have been working to curb the flow of the synthetic opioid into the United States.

HIV is spread by bodily fluids such as blood, breast milk or semen. It gradually weakens the body’s immune system and makes it vulnerable to disease, including ones rarely seen in otherwise healthy people. The surprising emergence of such cases in the 1980s is what tipped off health experts to what became known as the AIDS epidemic.

Proponents say USAID helped curb migration at its root – the same phenomenon the Trump administration wants to stop with policies like mass deportations from the US, ICE raids, and reinforcement at the southern border.