Survivors of the 2001 terrorist attack on New York City's World Trade Center who developed PTSD have a lasting risk of premature death, a new study finds.

The study of nearly 64,000 emergency responders and civilians found that the longer the post-traumatic stress disorder lingered, the more likely they were to die early from any cause.

Over 13 years of follow-up, more than...

The United States' ability to deal with major health emergencies quickly has improved significantly in recent years, researchers say.

In 2019, America scored 6.7 on the 10-point National Health Security Preparedness Index. That's a 3.1% improvement over the last year, and up 11.7% since the index was created in 2013.

The findings show the nation is better prepared to...