Frozen tuna lies on the ground at the Tsukiji fish market in Tokyo. The FDA recommends freezing raw fish before serving it in sushi as a way to keep it free of parasites. But as a recent outbreak of Salmonella in the U.S. highlights, freezing doesn't guarantee that raw sushi fish is pathogen-free. Koichi Kamoshida/Getty Images hide caption

itoggle caption Koichi Kamoshida/Getty Images

The uptick in serious bike injuries occurred for both male and female cyclists, although more men get in accidents each year. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Hereford, Texas, may have lovely vistas, but it's notably short of mental health care options. Kirk Kittell/Flickr hide caption

itoggle caption Kirk Kittell/Flickr

People who don't get enough sleep show higher levels of inflammation, say scientists who study colds. Smoking, chronic stress and lack of exercise can make you more susceptible to the viruses, too. Frederic Cirou/PhotoAlto/Corbis hide caption

itoggle caption Frederic Cirou/PhotoAlto/Corbis

Valerie Davidson, Alaska's health and social services commissioner, drives her 1983 Chevy truck to pick up salmon for a dinner party for 50 people. Annie Fiedt/Alaska Public Media hide caption

itoggle caption Annie Fiedt/Alaska Public Media

Dr. David Burkons holds the licensing certificates that allowed him to open a clinic that provides medical and surgical abortions. It took about 18 extra months of inspections, he says, to get the approval to offer surgical abortions. Sarah Jane Tribble/WCPN hide caption

itoggle caption Sarah Jane Tribble/WCPN

Oliver Sacks was an author, physician and a professor of neurology at the New York University School of Medicine. Chris McGrath/Getty Images hide caption

itoggle caption Chris McGrath/Getty Images

Detweiler was surprised to learn she wasn't eating enough to fuel her training regimen. As an athlete, doctors and nutritionists say, she needed more food variety and more calories — three snacks daily, as well as bigger meals. Courtesy of Nationwide Children's Hospital hide caption

itoggle caption Courtesy of Nationwide Children's Hospital

Eat fish or take a fish oil supplement? Research suggests eating fish regularly over a lifetime is good for the brain. But when it comes to staving off cognitive decline in seniors, fish oil supplements just don't cut it, a study finds. iStockphoto hide caption

itoggle caption iStockphoto