Sofia Jarvis, seen here with her family at a press conference in February, is one of several dozen children in California who have been diagnosed with a rare paralytic syndrome. It has left her left arm paralyzed. Martha Mendoza/AP hide caption

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Daniela Chavarriaga holds her daughter Emma as Dr. Jose Rosa-Olivares administers a measles vaccination at Miami Children's Hospital. Joe Raedle/Getty Images hide caption

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Students are given healthy choices on a lunch line at Draper Middle School in Rotterdam, N.Y., in 2012. To keep students from tossing out the fruits and vegetables they're served, researchers say it helps to give them a choice in what they put on their trays. Hans Pennink/AP hide caption

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Psychologists say spanking and other forms of corporal punishment don't get children to change their behavior for the better. Science Photo Library/Corbis hide caption

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PCR tests like this can tell if a virus is an enterovirus, but they can't ID the new virus that has caused a surge in serious respiratory infections. BSIP / Science Source hide caption

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13-year-old Will Cornejo of Lone Tree, Colo., recovers at Rocky Mountain Hospital for Children in Denver from what doctors suspect is enterovirus 68. His parents found him unconscious on the couch and called 911. He was flown to Denver for treatment. Cyrus McCrimmon/Denver Post/Getty Images hide caption

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People shop in a Miami grocery store on July 8. USDA says that despite the drop in unemployment, the number of food insecure Americans has not declined because higher food prices and inflation last year offset the benefits of a brighter job market. Joe Raedle/Getty Images hide caption

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A woman walks with children at an orphanage in Addis Ababa, Ethiopia. Policymakers have long called for orphans to be taken out of institutions and placed with foster families, but one study from Duke University is challenging that notion. Sean Gallup/Getty Images hide caption

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About 40 percent of high schools start before 8 a.m., which contributes to chronic sleep deprivation among teens, according to the American Academy of Pediatrics. Chris Waits/Flickr hide caption

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Amber Medel weighs her 3-week-old baby, Elijah, as lactation consultant Carol Chamblin takes note. Medel had problems breast-feeding and Chamblin encouraged her to use a breast pump to get the milk flowing more easily. M. Spencer Green/AP hide caption

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Logan Kovach, 6, Matthew Kovach, 2, and Allyson Kovach, 5, eat a lunch distributed by the YMCA in Hopkins County, Kentucky. Pam Fessler/NPR hide caption

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