US Measles Elimination Status: Risks and Implications of Current Outbreaks

The United States is currently facing a significant risk of losing its official measles elimination status due to a series of outbreaks that began in early 2025 and have continued into 2026. This status, maintained since 2000, indicates that a country has not experienced very large outbreaks or 12 months or more of uncontrolled domestic transmission of the virus.

According to a policy watch updated by KFF on April 7, 2026, the current trend of measles transmission threatens this designation. The Pan American Health Organization (PAHO) is the body responsible for determining measles elimination status.

Current Case Data and Outbreak Trends

Data from the Centers for Disease Control and Prevention (CDC) as of April 2, 2026, shows that 1,671 confirmed measles cases have been reported in the United States so far in 2026. Of these cases, 1,661 were reported across 33 jurisdictions, while 10 cases were reported among international visitors.

The 2026 cases are heavily linked to outbreaks. As of April 3, 2026, the CDC reported 17 new outbreaks in 2026. Approximately 94% of confirmed cases in 2026—1,570 out of 1,671—are outbreak-associated. This total includes 374 cases from outbreaks that began in 2026 and 1,196 cases from outbreaks that originated in 2025.

This follows a significant surge in 2025, during which a total of 2,286 confirmed measles cases were reported in the United States. In 2025, cases were reported across 45 jurisdictions, with 25 cases occurring among international visitors.

KFF reports that from January 2025 through the end of March 2026, U.S. States have reported over 3,800 measles cases in total.

Geographic Distribution

The spread of the virus in 2026 has been widespread, with reports coming from the following 33 jurisdictions:

• Alaska, Arizona, California, Colorado, Florida, Georgia, Idaho, Illinois, Kentucky, Maine, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, New Mexico, New York City, New York State, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Texas, Utah, Vermont, Virginia, Washington, and Wisconsin.

This is a slight contraction from 2025, when cases were reported in 45 jurisdictions, including Alabama, Arkansas, Connecticut, Hawaii, Indiana, Iowa, Kansas, Louisiana, Maryland, Nevada, New Jersey, Rhode Island, Tennessee, and Wyoming, in addition to the states reporting in 2026.

Contributing Factors to Ongoing Transmission

Analysis from KFF identifies several systemic and social factors that have contributed to the ongoing transmission of measles in the U.S.

Funding and staffing cuts for public health efforts at local, state, and federal levels have hindered measles prevention and response efforts. This institutional instability has been compounded by leadership gaps; KFF notes that there has been no Senate-confirmed leader at the CDC for almost the entire period since these outbreaks began.

The policy watch also highlights the role of public communication and trust. The report cites mixed messages from federal health officials such as Department of Health and Human Services (HHS) Secretary Robert F. Kennedy, Jr. Regarding measles response as a contributing factor.

public health authorities are contending with a decline in general trust and increased skepticism regarding the safety and effectiveness of measles vaccines. These trends have led to lower vaccination rates, which complicates outreach and communication efforts required to control the current outbreaks.

Significance of Elimination Status

The loss of elimination status would signal that the United States can no longer prevent the uncontrolled domestic spread of the virus. Because measles is highly contagious, the maintenance of high vaccination rates and robust public health surveillance is essential to prevent the virus from becoming endemic again.

The current trajectory, characterized by thousands of cases over 15 months and dozens of affected jurisdictions, places the U.S. In a position where the criteria for elimination—specifically the absence of 12 months of uncontrolled domestic transmission—may no longer be met.