Measles Tracker Update: June 7th

Jun 07, 2025

As of June 6, a total of 1,168 cases across by 34 jurisdictions have been reported
The vast majority of confirmed cases 96% involve individuals who are either unvaccinated or whose vaccination status is unknown.
Young children under age 5 account for nearly a quarter of all hospitalizations.
In 2025 thus far, there have been 17 outbreaks* (defined as 3 or more related cases per CDC) reported, and 89% of confirmed cases (1,040 of 1,168) are outbreak-associated. For comparison, 16 outbreaks were reported during 2024 and 69% of cases (198 of 285) were outbreak-associated

Most impacted age group

By total cases: 5–19 years (38% of all cases)

By highest hospitalization: Children under 5 years (21% hospitalized)

Measles Is Now Showing Up in Wastewater. Read more Here
US measles cases nearing 30-year high. The U.S. is currently on track to surpass the 1,274 cases seen in 2019, and is expected to see the highest number of cases since 1992. Read more Here
CDC steps up measles travel warning after spread in airplane. The Centers for Disease Control and Prevention (CDC) has escalated its travel warning regarding measles, citing a significant number of cases this year where infectious individuals flew on domestic airplanes. This updated alert emphasizes the heightened risk of contracting the virus during air travel. Here