A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

Measles was declared eliminated from the United States 25 years ago. Now, the Centers for Disease Control reports major ...

CDC data shows 2025 is now the worst year for measles cases in this country in more than three decades. More than 150 people have been hospitalized due to the growing outbreak and three have died, ...

The number of measles cases in the United States has surpassed 2019's wave of infections, according to Centers for Disease ...

Measles was considered eradicated in the United States in 2000. For the first time in 25 years, cases have reached a new high ...

New landmark research has successfully mapped 37,000 years of infectious disease across ancient human populations.

Emergency room visits for tick bites are at a six-year high. Here’s how to prevent tick bites, and what to do if you get ...

While measles symptoms typically resolve in a few weeks, the virus can cause pneumonia, making it difficult for patients, ...

With mosquitoes in Illinois, Indiana, and now Kentucky testing positive for West Nile virus, it's more important than ever to make sure you take precautions to prevent mosquito bites.

The U.S. has seen more measles cases in 2025 than in any year since the virus was declared "eliminated" in 2000.