Nearly 30 million people have been killed by AIDS and more than 33 million have the virus that causes it.
A deadly and contagious disease is wiping out amphibians around the world. Although there is no cure, scientists know how it spread.
A measles outbreak that hospitalized nearly a dozen children in Minneapolis can be traced back to one doctor's fraud.
Broccoli fights cancer. Mom knew that, now science offers the proof.
Though electricity and clean water are scarce, cell phones are abundant and make for a cheap way to bring the benefits of information, in the form of videos, to those in developing countries.
Just when it seems the scandal surrounding Andrew Wakefield can't get any worse, it does.
The cholera outbreak ravaging Haiti began at a camp for UN peacekeepers from Nepal, according to experts.
Determining the source of the outbreak could be useful for tracing the origins of other feared bacteria, including anthrax and tuberculosis.
Cholera is primarily passed on through contaminated water or food and can spread like wildfire through Haiti's unsanitary tent cities.
Protests over the use of the word "gay" in the new comedy film "The Dilemma" raise questions about language and the changing definitions of words.