Dozens of Clinical Trials Have Been Frozen in Response to Trump’s USAID Order

Asanda Zondi received a startling phone call last Thursday, with orders to make her way to a health clinic in Vulindlela, South Africa, where she was participating in a research study that was testing a new device to prevent pregnancy and H.IV. infection.

The trial was shutting down, a nurse told her. The device, a silicone ring inserted into her vagina, needed to be removed right away.

When Ms. Zondi, 22, arrived at the clinic, she learned why: The U.S. Agency . . .