The United States has recorded 2,566 confirmed measles cases so far in 2026, extending the country’s highest annual total in more than 35 years, according to updated federal data.
The Centers for Disease Control and Prevention said the cases had been reported as of Aug. 13. Of that total, 2,550 infections were reported across 47 U.S. jurisdictions and 16 involved international visitors.
The CDC also reported 38 new outbreaks this year. About 94% of confirmed cases—2,407 infections—are connected to outbreaks. The 2026 count has already exceeded the 2,289 confirmed cases recorded during all of 2025.
Measles is highly contagious and can cause serious complications, particularly among babies, pregnant people and individuals with weakened immune systems. The virus spreads through the air when an infected person coughs or sneezes.
The CDC recommends two doses of the measles, mumps and rubella vaccine for children and says adults should confirm that they have evidence of immunity. People who believe they were exposed should contact a healthcare provider before arriving at a clinic so precautions can be arranged.
Reuters reported Friday that the rising total continues a resurgence not seen nationally since the early 1990s.
