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These tests are designed to identify people who have been previously exposed to the virus. The Food and Drug Administration is now telling manufacturers they'll have to meet minimum standards.

The University of Maryland, Baltimore, now has a master's program dedicated to the science and therapeutics of medical weed because of a growing number of students looking for expertise in the field.

The longtime Georgia congressman died Friday of pancreatic cancer. Lewis, who devoted his life to activism and the civil rights movement, was known as "the conscience of the Congress."

Former diplomat Tianna Spears says she was pulled aside 20-plus times crossing from Mexico into the U.S. "One time, I was told not to look at the officer in the eyes when I spoke to him," she says.

Scientists are racing to develop a vaccine that proves "safe and effective." It may not prevent infection in everyone who gets it, but it still could eventually stop the pandemic. Here's how.

NPR's David Greene talks to Charles Mok, a lawmaker in Hong Kong's legislature, who opposes an expected security measures aimed at tightening Beijing's grip on the semi-autonomous territory.

Brain scans of 104 boys and girls doing basic math tasks found no gender differences. The finding adds to the evidence that boys and girls start out with equal ability in math.

"You have stolen my dreams, and my childhood, with your empty words. And yet I'm one of the lucky ones," activist Greta Thunberg, 16, tells world leaders.

UC San Diego researchers have joined a nationwide study looking into whether a wearable device could provide data showing that a person is getting sick before they feel symptoms.

Here are the positions of the two candidates on issues ranging from the Mexico City policy (involving abortion services) to refugees to membership in the World Health Organization.