As of April 18, 2025, the United States is grappling with a significant measles outbreak, with 800 confirmed cases across 25 states, according to the Centers for Disease Control and Prevention (CDC) [1][2]. This marks a substantial increase from the 285 cases reported in the entirety of 2024 [2].

Texas remains the epicenter of the outbreak, with 597 cases reported as of Friday [1][2]. The outbreak in West Texas, which began nearly three months ago, has resulted in 62 hospitalizations and two fatalities among unvaccinated elementary school-aged children [1][2].

Other states with active outbreaks, defined as three or more related cases, include Indiana, Kansas, Michigan, Oklahoma, Ohio, Pennsylvania, and New Mexico [1][3]. Michigan and Pennsylvania are the latest additions to this list, with Michigan confirming a new outbreak near Grand Rapids and Pennsylvania declaring an outbreak in Erie County earlier this week [3][4].

The outbreak has also claimed the life of an unvaccinated adult in New Mexico [1][3]. Health officials stress that the majority of cases are occurring in unvaccinated individuals or those with unknown vaccination status [2].

Despite the continued spread of the virus, U.S. Health Secretary Robert F. Kennedy Jr. claimed in a televised Cabinet meeting on April 10 that measles cases were plateauing nationally [3][4]. This statement has drawn criticism from health experts given the ongoing increase in cases.

The CDC emphasizes that the measles, mumps, and rubella (MMR) vaccine is highly effective, with two doses providing 97% protection against the disease [12]. Public health officials continue to urge vaccination as the primary means of controlling the outbreak and preventing further spread.

As the situation evolves, health departments across the affected states are working to contain the outbreaks and provide accurate, up-to-date information to their communities. The CDC continues to monitor the situation closely and provide support to state and local health authorities in their response efforts.