Bacterial infections that are resistant to treatment by our existing antibiotics are a huge threat to human health — and an enormous challenge for medicine. Scientists are exploring one fascinating line of research: compounds modeled after those found in the blood of the fearsome Komodo dragon.

Infectious disease researcher Romina Libster wants us to understand that vaccines are really not a matter of personal choice.

The current approach to treating Ebola is makeshift, at best. A doctor shares the reality of life on the humanitarian frontline in Liberia, while Bill Gates calls for a new approach to treating epidemics.