Advisers to the Centers for Disease Control and Prevention recommended against flu shots containing the ingredient thimerosal. Why is the additive, safely used since the 1930s, being questioned again?

Tropical Storm Chantal grew in strength as it approached the southeast U.S. coast. It's forecasted to bring heavy rains to parts of the Carolinas on Sunday.

The Dalai Lama turned 90 on Sunday surrounded by thousands of followers, who thronged the Himalayan town of Dharamshala.

Iran' s Supreme Leader Ayatollah Ali Khamenei on Saturday made his first public appearance since the 12-day war between Israel and Iran began, attending a mourning ceremony on the eve of Ashoura.

At least 67 people are dead following flooding that slammed central Texas over the weekend, while a desperate search for 11 missing girls continues.

NPR has compiled a timeline of when local, state and federal officials posted warnings on social media as well as the timeline of events as presented by local officials.

How will the Trump administration's cuts to HIV research impact the progress that's been made towards ending the epidemic in the U.S.?

Heat and wildfire smoke affect birth outcomes, according to a new study of women in Los Angeles.

The number of people dead rose Saturday after the "catastrophic" flooding from Friday Morning along the Guadalupe River in central Texas. Houston Public Radio's Dominic Anthony Walsh reports from the area.

President Trump has signed a disaster declaration to give more resources to Kerr County, Texas, in the wake of the flooding.