Why I volunteered to be infected with dengue fever

Early in the pandemic, a volunteer takes part in a clinical trial to develop a vaccine that will protect against COVID-19. The U.S. government has registered over half a million clinical trials since 2000. The vast majority of the trials don

The U.S. has registered over half a million clinical trials since 2000. Here's a look at the business and ethics of human medical experimentation through the eyes of a volunteer.

(Image credit: Joe Raedle)