CNN's Dr. Sanjay Gupta takes you inside the Centers for Disease Control Ebola "war room" where they are tracking the current Ebola crisis.
After surviving testicular cancer, Jamil Nathoo took on triathlon on his quest to get back into shape.
Six CNN viewers selected for the Fit Nation challenge have transformed their bodies and minds.
USAID Administrator Dr. Rajiv Shah talks with CNN's Dr. Sanjay Gupta about what efforts are on the ground to stop Ebola.
Sanjay Gupta explains what happens to your brain on opiates, the key ingredient in heroin and other powerful narcotics.
A third American physician, Dr. Rick Sacra, has been diagnosed with Ebola while working in Liberia.
"Sandy's Story" is a look at the cruel journey of a vibrant, once healthy man as he gradually loses his memory.