A new study from the Centers for Disease Control and Prevention finds no link between the number of vaccinations a young child receives and the risk of developing autism spectrum disorders. Jeff J. Mitchell/Getty Images hide caption

itoggle caption Jeff J. Mitchell/Getty Images

George McCann has been diagnosed with a subtype of bipolar disorder called the "fear of harm" profile, and finds that a prescribed dose of ketamine every few days alleviates his symptoms. Michael Rubenstein for NPR hide caption

itoggle caption Michael Rubenstein for NPR

Prepacked foods marketed for toddlers can have extremely high levels of sodium compared to the 1,500-milligram daily limit recommended by the American Heart Association Daniel M.N. Turner/NPR hide caption

itoggle caption Daniel M.N. Turner/NPR

April DeBoer (second from left) sits with her adopted daughter Ryanne (left) and partner, Jayne Rowse (fourth from left), and her adopted sons Jacob (middle) and Nolan (right) at their home in Hazel Park, Mich. The lesbian couple's desire to adopt each other's children has grown into a potentially ground-breaking challenge to Michigan's ban on same-sex marriage. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Parents are currently advised to switch toddlers to reduced-fat milk at age 2. David M. Goehring/Via Flickr hide caption

itoggle caption David M. Goehring/Via Flickr

The anthrax vaccine has been given to more than 1 million adults in the military. But no one knows how well it would work in children. Randy Davey/Reuters/Landov hide caption

itoggle caption Randy Davey/Reuters/Landov

Robert Monges, a coach for James Lick High School, checks tight end Dominic Brewster for a concussion during a football game played in Morgan Hill, Calif., in 2006. Patrick Tehan/San Jose Mercury News/MCT/Landov hide caption

itoggle caption Patrick Tehan/San Jose Mercury News/MCT/Landov

Lauren Fant winces as she receives her third and final shot of HPV vaccine from nurse Stephanie Pearson in Marietta, Ga., in 2007. John Amis/AP hide caption

itoggle caption John Amis/AP

Emily Rapp is also the author of Poster Child, about a congenital birth defect that led to the amputation of her leg when she was a child, and about how she subsequently became a poster child for the March of Dimes. Anne Staveley/Penguin Press hide caption

itoggle caption Anne Staveley/Penguin Press

Ten milligram tablets of the prescription drug Adderall. The drug is used to treat ADHD and is used by some students to boost their academic performance. Jb Reed/Bloomberg via Getty Images hide caption

itoggle caption Jb Reed/Bloomberg via Getty Images