
A trial was about to launch for a vaccine that would ward off the HIV virus. It would be an incredible breakthrough. Then it looked as if it would be over before it started.
(Image credit: Tommy Trenchard for NPR)

A trial was about to launch for a vaccine that would ward off the HIV virus. It would be an incredible breakthrough. Then it looked as if it would be over before it started.
(Image credit: Tommy Trenchard for NPR)