Launch of the Malaria Vaccine in Ghana

Find out about why there is so much excitement about this new therapy, which patients are the best candidates, as well as CAR T-cell effectiveness, safety, and costs.

Discover the science of how viruses can jump from one species to another and the deadly epidemics that can result from these pathogens.

Every year around half a million people in the United States get sick from the bacterium C. diff, often after taking antibiotics. Sound counterintuitive? On Reactions we break down why that happens, and how an unlikely hero could save the day.