NPR Health

More than a thousand residents of a public housing complex in East Chicago, Ind., are now forced to relocate because of dangerously high lead levels in the area's soil.

The West Calumet Housing Complex, which houses primarily low-income families, lies on the site of a former lead smelting company, as member station WBEZ reported.

Teen pregnancy is way down. And a study suggests that the reason is increased, and increasingly effective, use of contraceptives.

From 2007 to 2013, births to teens ages of 15 and 19 dropped by 36 percent; pregnancies fell by 25 percent from 2007 to 2011, according to federal data.

The Food and Drug Administration is warning that patients and doctors should more fully understand the potentially life-threatening risks of combining anti-anxiety or sleep medications with prescription opioids.

An experimental drug dramatically reduced the toxic plaques found in the brains of patients with Alzheimer's disease, a team reports in the journal Nature.

Results from a small number of patients who received a high dose of the drug, called aducanumab, hint that it may also be able to slow the loss of memory and thinking.

"I'm not comfortable eating a watch battery." That's how researcher Christopher Bettinger describes one of the biggest obstacles for sending tiny medical robots into the human body for diagnosing and treating diseases.

These devices run on batteries (like those in watches) and they are usually made of toxic materials such as lithium.

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