A Yale University study analyzed the experience of 60 million Americans covered by traditional Medicare between 1999 and 2013, and found "jaw-dropping improvements in almost every area," the lead author says. Ann Cutting/Getty Images hide caption

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For best quality of life, many cancer patients who can't be cured might do best to forgo chemo and focus instead on pain relief and easing sleep and mood problems, a survey of caregivers suggests. iStockphoto hide caption

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National Institutes of Health funding has been flat for years. iStockphoto hide caption

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A user prepares drugs for injection in 2014 in St. Johnsbury, Vt. Spencer Platt/Getty Images hide caption

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Kids and teens should get two to three quarts of water per day, via food or drink, research suggests. iStockphoto hide caption

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A Stanford University study explored the medical records of millions of people looking for patterns. People taking proton-pump inhibitors for chronic heartburn seemed to be at somewhat higher risk of having a heart attack than people not taking the pills. IStockphoto hide caption

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A single Lassa fever virus particle, stained to show surface spikes — they're yellow — that help the virus infect its host cells. London School of Hygiene & Tropical Medicine hide caption

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The posterior end of the Loa loa worm is visible on the left. The disease-causing worm can now be located with a smartphone/microscope hookup. That's a big help because a drug to treat river blindness can be risky if the patient is carrying the worm. BSIP/UIG via Getty Images hide caption

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Bob Skierski at the beach in Avalon, N.J., just hours before he fell ill and went to the hospital. He never went home. Courtesy of Jennifer Rodgers hide caption

itoggle caption Courtesy of Jennifer Rodgers