Epidemiology

Researchers filmed 10 species eating or scavenging bats at a known Marburg-virus hotspot—and caught hundreds of humans visiting

A comprehensive study found differences in numerous health conditions in firstborn children versus those born second

The White House has nominated Erica Schwartz to replace NIH director Jay Bhattacharya as CDC chief. Bhattacharya has been leading the CDC on an acting basis since February, after the public health agency’s director was fired in 2025

Infections of the BA.3.2 variant of the COVID-causing coronavirus are still at very low levels, but experts are concerned it may be resistant to immunity from vaccines or prior infection

The COVID pandemic ushered mRNA vaccines into the spotlight, and the technology has even greater potential. Here’s what to know about the way that they work, their safety, and more

We have severely undercounted the number of COVID deaths, scientists say

A new study finds that heart attack deaths in U.S. hospitals are rising in people aged 54 and below, signaling a shift in cardiovascular issues in younger ages

As the U.S. officially breaks 1,000 measles cases in 2026, experts say that the rate of infections is accelerating much faster this year than it did in years past

A new study suggests that people with obesity have higher rates of mortality and hospitalization from a variety of infections from viruses, fungi, parasites and bacteria

The South Carolina measles outbreak has triggered rare but serious brain swelling in some children

Fewer people under age 50 are dying from cancer in the U.S., but colorectal cancer mortality rates continue to surge

The U.S. has held its measles-free status for more than 25 years. Experts say unrelenting outbreaks in the past year may change that