Patti NeighmondAward-winning journalist Patti Neighmond is NPR's health policy correspondent. Her reports air regularly on NPR newsmagazines All Things Considered, Morning Edition, and Weekend Edition.
Paul Rider runs on Mulholland Drive in Los Angeles, March 25, 2011. Researchers say a moderate running regimen is actually beneficial for the joints of people with healthy knees.
Dennis J. Provost for NPR
An airline passenger wears a mask to protect against viruses. Passengers are at risk of becoming infected in the airplane's cabin, just as they would be in any crowded, confined space.
Eitan Abramovich/AFP via Getty Images