Vera Wojtesta was one of 300 babies flagged by New York's newborn screening program as at risk of having life-threatening Krabbe disease. Ben Shutts/Courtesy of the Wojtesta family hide caption

itoggle caption Ben Shutts/Courtesy of the Wojtesta family

Though some people might need more of specific vitamins, multivitamins don't help most people, studies say. iStockphoto hide caption

itoggle caption iStockphoto

There's no evidence that triclosan and other chemicals in antibacterial soaps do a better job than plain soap and water, the FDA says. Kiichiro Sato/AP hide caption

itoggle caption Kiichiro Sato/AP

Being the littlest may mean more protection and care from parents, psychologists say. Getty Images/Image Source hide caption

itoggle caption Getty Images/Image Source

A polio worker vaccinates a child in Khyber-Pakhtunkhwa province, Pakistan, in October. Arshad Arbab/EPA/Landov hide caption

itoggle caption Arshad Arbab/EPA/Landov

Students at Northeast Elementary Magnet, in Danville, Ill., play around. Fewer than 1 in 5 parents polled said their kids were getting physical education daily. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP

David Vetter was born without a functioning immune system and spent his life in a bubble that protected him from germs. He died at age 12 in 1984. Scientists are using gene therapy to treat the disorder so that children can live normally. Science Source hide caption

itoggle caption Science Source

Students at Lowell High School in Michigan sit down for lunch. Shorter lunch breaks mean that many kids don't get enough time to eat and socialize. Emily Zoladz/Landov hide caption

itoggle caption Emily Zoladz/Landov

Nurses tend newborns at Sloane Hospital for Women in New York City. Pat Carroll/Getty hide caption

itoggle caption Pat Carroll/Getty

Syrian boys line up to get the polio vaccine at a refugee camp in Sidon, Lebanon, on Nov. 7. The Lebanese government plans to vaccinate all kids under age 5 for the virus, including Syrian refugees. Mohammad Zaatari/AP hide caption

itoggle caption Mohammad Zaatari/AP

Colleen Frainey, 16, of Tualatin, Ore., cut back on advanced placement classes in her junior year because the stress was making her physically ill. Toni Greaves for NPR hide caption

itoggle caption Toni Greaves for NPR

The Odon Device was inspired by a YouTube video about how to remove a cork from the inside of a wine bottle. The Odon Device hide caption

itoggle caption The Odon Device

Children under age 2 can reason abstractly, researchers say. Jandrie Lombard/iStock hide caption

itoggle caption Jandrie Lombard/iStock
Illustration by Daniel Horowitz for NPR