CDC update shows 2,318 cases as of Thursday
The CDC logged 2,318 cases of measles as of Thursday, according to an agency update on Friday. The nation had 2,289 cases in 2025, which was already the worst year for measles in more than three decades.
The 2026 tally has now easily become the worst year for measles in the United States since 1991, the agency reported. Major outbreaks in South Carolina, Utah and Arizona have sickened hundreds, and smaller clusters of cases have sparked in other states, according to the CDC.
With five months still remaining in 2026, health officials face the prospect of case counts continuing to climb in the months ahead.