A total of 884 confirmed cases of measles have been reported across 30 U.S. states since the beginning of the year until April 24, the Centers for Disease Control and Prevention said in an April 25 update.
“There have been 11 outbreaks (defined as three or more related cases) reported in 2025, and 93 percent of confirmed cases (820 of 884) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024, and 69 percent of cases (198 of 285) were outbreak-associated,” said the agency.
At the end of March, the number was approximately 736, so around 148 new cases have been reported in April, based on weekly CDC estimates.
“Measles is highly contagious. If one person has it, up to 9 out of 10 people nearby will become infected if they are not protected,” it said….