US Measles Cases Reach 35-Year High as Vaccination Rates Decline

US Records Highest Measles Case Total in More Than 35 Years

The United States has recorded 2,566 confirmed measles cases so far in 2026, according to the U.S. Centers for Disease Control and Prevention. The figure represents the highest annual total in more than 35 years, as measles infections continue to rise amid declining childhood MMR vaccination rates.

Measles Cases Reach Highest Level in Decades

The CDC reported 2,566 confirmed measles cases across the United States this year.

The figure marks the highest number of cases recorded in a single year since the major measles resurgence between 1989 and 1991, when more than 55,000 infections and 123 deaths were reported.

The latest figures highlight the scale of the current outbreak after measles had previously been declared eliminated in the United States.

Hospitalizations Rise Without Reported Deaths

There have been 169 measles-related hospitalizations so far in 2026, according to the CDC.

No deaths have been reported from measles this year.

For comparison, the United States recorded 243 measles-related hospitalizations and three deaths during 2025.

While the current number of hospitalizations remains below last year's figure, the rapid increase in total infections has intensified concerns about the spread of the highly contagious disease.

Unvaccinated People Account for Most Cases

Vaccination status remains a major factor in the 2026 figures.

The CDC said 93% of this year's cases occurred among people who were unvaccinated or whose vaccination status was unknown.

The remaining cases involved people who had received either one or two doses of the measles vaccine before becoming infected.

The figures highlight the continuing relationship between vaccination coverage and the spread of measles.

Cases Reported Across the United States

The CDC has documented measles infections in 45 states, as well as New York City and the District of Columbia.

There have been 38 new outbreaks reported during 2026, compared with 48 outbreaks in 2025.

Although the number of reported outbreaks is lower than last year, the overall number of infections has reached a much higher level.

South Carolina Outbreak Becomes Largest in Years

One of the most significant outbreaks has occurred in South Carolina.

The outbreak, which began in October 2025, has sickened nearly 1,000 people over a six-month period.

It has become the largest single-location measles outbreak in the United States since the disease was declared eliminated nationally in 2000.

The scale and duration of the outbreak demonstrate how quickly measles can spread when vaccination protection is insufficient.

MMR Vaccination Rates Under Pressure

The increase in measles infections over the past two years has coincided with a steady decline in childhood MMR immunization rates.

According to the CDC information cited in the report, vaccination rates have fallen since the beginning of the COVID-19 pandemic.

The decline has created conditions in which outbreaks can spread more easily, particularly among communities with lower vaccination coverage.

A Growing Public Health Challenge

The 2026 figures represent a significant change from the period when measles was considered eliminated in the United States.

The combination of declining vaccination rates and highly contagious measles has contributed to a renewed public health challenge.

With infections now recorded across dozens of states, the outbreak has moved beyond isolated local clusters.

The current situation also demonstrates how quickly previously controlled diseases can return when population-level vaccination coverage declines.

The US Faces a Renewed Measles Threat

The 2,566 confirmed cases recorded so far this year have pushed the United States to its highest annual measles total in more than three decades.

Although no deaths have been reported in 2026, hospitalizations and widespread infections demonstrate the continuing impact of the disease.

The current outbreak also raises broader questions about maintaining childhood vaccination coverage after the disruptions of the COVID-19 pandemic.

With measles cases continuing to be reported across the country, the United States is facing its most significant measles challenge in decades.