Alex Schwartzman, a law student at George Washington University in Washington, D.C., is one of only 8 to 39 percent of college students who get the flu shot in a given year.
A skull discovered at a sacred Aztec temple. A new study analyzed DNA extracted from the teeth of people who died in a 16th century epidemic that destroyed the Aztec empire, and found a type of salmonella may have caused the epidemic.
Health workers killed chickens in a Hong Kong market in 2014 in an effort to stop the spread of H7N9 flu. It's being watched closely as a virus that might spark a pandemic outbreak.