Tennessee has four confirmed measles cases, and health care experts know with certainty that means more are on the way. Measles was declared eliminated from the United States in 2020, but it is surging again as parents decline to vaccinate their children.

An unvaccinated adult who lives in Pueblo developed measles after visiting a part of Mexico that has an ongoing outbreak.

The Tennessee Department of Health confirmed three additional measles cases in Middle Tennessee on Tuesday, less than two weeks after the region reported its first case. One of the new cases confirmed Tuesday is related to Tennessee's first confirmed case on March 21. No additional details are available about Tennessee’s positive cases.

As measles spreads across the U.S., a few fully vaccinated people have contracted rare breakthrough cases. Here's what to know and why vaccination is still important.

Confirmed measles cases in the US grew by 28% in a week to reach 483 this year, worsening a deadly outbreak that has already surpassed last year’s total.

Texas has reached 400 cases of measles in an outbreak that started two months ago. Texas, New Mexico, Ohio, Kansas and Oklahoma all have active measles outbreaks.

The number of measles cases is rising across Japan, but many on social media are spreading misinformation that the disease is not serious. Ah･･･

As the state continues to track cases of measles in Oklahoma, they’re mindful of exposure to the virus as well.