US Measles Cases Exceed 1,600 in Early 2026

Public health officials reported more than 1,600 measles cases across the United States as of early April 2026, putting the country on track to exceed the 2,286 infections recorded for all of 2025, the highest annual total since 1991. The surge includes an ongoing outbreak that originated in rural Utah last June and has since expanded into the state's urban areas, affecting hundreds of residents and highlighting vulnerabilities in community immunity.

The Utah outbreak began with a small cluster in a rural setting but has grown through sustained transmission, reaching densely populated corridors where vaccination coverage varies. Health authorities have identified cases linked to schools, workplaces, and community gatherings, prompting intensified efforts to trace contacts and verify vaccination status. Nationally, 94 percent of 2026 cases are associated with outbreaks, many originating from 2025 chains, and 92 percent involve unvaccinated individuals. While no deaths have been reported this year, three occurred in 2025, and about 5 percent of cases have required hospitalization, compared to 11 percent the previous year.

The broader resurgence extends to the Americas region,...