The FDA wouldn't approve covid challenge trials a couple years ago. Healthy young people were eager to volunteer, and the need was dire. The case fatality rate was still high, and at that point we weren't expecting a vaccine for another couple years.
The FDA wouldn't approve covid challenge trials a couple years ago. Healthy young people were eager to volunteer, and the need was dire. The case fatality rate was still high, and at that point we weren't expecting a vaccine for another couple years.