WASHINGTON — Measles cases have surged across the United States in 2026, with more than 2,100 confirmed infections reported so far this year, according to federal health officials.
The Centers for Disease Control and Prevention said as of June 18, 2026, there were 2,104 confirmed cases nationwide. Most cases, about 93 percent, are linked to outbreaks, many of which began in 2025 and continued into this year.
Cases have been reported in more than 40 jurisdictions, including states such as South Carolina, Utah, Texas and Florida, which have seen some of the highest numbers. Health officials attribute the rise primarily to pockets of low vaccination coverage.
"Measles is highly contagious and can cause serious complications, especially in young children and those with weakened immune systems," a CDC spokesperson said in a statement. Officials have urged families to ensure children receive the two-dose measles, mumps and rubella (MMR) vaccine, which provides strong protection when administered on schedule.
The increase comes amid broader concerns about declining vaccination rates in parts of the country. Public health experts have pointed to vaccine skepticism as a contributing factor, though vaccination decisions remain a matter of individual and parental choice. Similar trends have been observed internationally, with some European countries losing their measles elimination status earlier this year.
Measles was declared eliminated in the United States in 2000, meaning there was no continuous transmission for more than 12 months. However, the disease can be reintroduced through international travel and spread rapidly in under-vaccinated communities. In 2025, the U.S. recorded 2,288 cases, the highest annual total since 1991.
This year's figures already approach last year's total. CDC data indicate that the vast majority of 2026 cases — around 92 percent — have occurred in people who are unvaccinated or whose vaccination status is unknown. About 6 percent of patients have required hospitalization.
Local and state health departments have responded with enhanced surveillance, contact tracing and vaccination clinics in affected areas. Officials continue to recommend that travelers, particularly those visiting countries with active measles transmission, verify their immunization status before departure.
As of mid-June, the total number of outbreaks reported in 2026 stands at 30. Health authorities said investigations are ongoing to determine the full scope of transmission chains.
The CDC and state officials continue to monitor the situation and provide updates as additional cases are confirmed.
