Multistate Measles Outbreak Surpasses 450 Cases, Sparks International Concern

 

A multistate measles outbreak in the US has surpassed 450 cases, sparking international concern. As of March 20, 2025, the Centers for Disease Control and Prevention (CDC) reported 378 confirmed measles cases across 18 jurisdictions ¹. However, it's essential to note that this number might not reflect the most up-to-date figures, as the CDC updates its data weekly.

The outbreak has been linked to international travel, with many cases reported among unvaccinated individuals. The CDC emphasizes the importance of measles vaccination, particularly for travelers and children. The measles, mumps, and rubella (MMR) vaccine is highly effective, with two doses being 97% effective against measles.

- Vaccination Rates: Declines in measles vaccination rates globally have increased the risk of outbreaks.

- International Travel: Many cases have been linked to international travel, highlighting the importance of vaccination for travelers.

- Community Transmission: The risk of community transmission is higher in areas with low vaccination rates .

The CDC recommends that all U.S. residents older than 6 months without evidence of immunity receive MMR vaccination before traveling internationally . Healthcare providers should also ensure children are current with their MMR vaccinations.