Measles cases in the U.S. have been rare in recent decades, thanks to a strong childhood vaccination program. But a few cases inevitably pop up each year as travelers bring the virus in from other ...

In 2025, United States recorded the most measles cases in more than 30 years, Centers for Disease Control and Prevention data shows. A large share of the infections were connected to an outbreak in ...

Summer travel raises fears that the highly infectious virus will spread. Here’s how to protect yourself and your family. By Perri Klass, M.D. Dr. Perri Klass is a professor of journalism and ...

The U.S. has confirmed an average of 22 weekly cases over the past two weeks. About a month ago, the rate of new measles cases was accelerating at a seemingly unprecedented rate with more than 100 ...

The outbreak comes after the US charted its highest number of annual measles cases in more than three decades in 2025.