An artistic illustration of the rotavirus. petersimoncik /iStockPhoto.com hide caption

Almost all adult smokers say they got their start before age 18. iStockphoto.com hide caption

Candy-flavored cigars like these in a shop in Albany, N.Y., are the focus of efforts to restrict sales of sweet-flavored tobacco. Hans Pennink/Associated Press hide caption

Katie Doderer, with dad Mark, big sister Emily, and mom Marcy, has a rare medical condition that requires 24-hour use of a ventilator. courtesy of the Doderer family hide caption

What should parents be told before their premature infants participate in a clinical study? iStockphoto.com hide caption

Where a boy is born has a big influence on whether he'll be circumcised, data from the Centers for Disease Control and Prevention show. CDC hide caption

Dr. Charles Ryan checks on a patient. Annie Feidt hide caption

Almost one-third of white high school girls say they seek out indoor tans. iStockphoto.com hide caption

It hurts now. And it hurts later, too. iStockphoto.com hide caption

Ray Copeland, a football coach at Bishop McGuinness High School, puts his players through a workout in Oklahoma City in 2007. As is often the case in much of the U.S., the first day of high school football practice that year began in a heat wave. AP hide caption

There's only one way to know if magnets and kids attract: with an x-ray. Julie Brown/Seattle Children"s Hospital hide caption

Small declines in obesity among young kids could help stem bigger problems in the future. Ocean/Corbis hide caption

More than three quarters of new babies get at least a start at breast-feeding, according to the CDC. iStockphoto.com hide caption

A mother and daughter walk home after attending a community meeting about eradicating female genital mutilation in the western Senegalese village of Diabougo. Finbarr O'Reilly/Reuters /Landov hide caption

The X-ray reveals a blowdart lodged in a teenager's windpipe. Reproduced with permission from Pediatrics @AAP hide caption