US Surpasses 1,000 Measles Cases for Third Time in 26 Years

CDC data shows vaccination rates have declined in recent years, contributing to the rise in cases.

Published on Feb. 28, 2026

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The United States has surpassed 1,000 measles cases for the third time in 26 years, according to updated data from the Centers for Disease Control and Prevention (CDC). At least 154 new measles cases were confirmed in the last week, bringing the total to 1,136 cases across 27 states so far this year. The current measles situation is partly driven by a large outbreak in South Carolina that began last year, with 979 cases recorded as of Friday.

Why it matters

Measles is a highly contagious viral disease that can lead to serious complications, especially in young children. The rise in cases highlights the importance of vaccination to maintain herd immunity and protect vulnerable populations. The decline in vaccination rates in recent years is a concerning trend that public health officials are working to address.

The details

About 92% of the measles cases are among people who are unvaccinated or whose vaccination status is unknown. Only 4% of cases are among those who have received just one dose of the measles, mumps, rubella (MMR) vaccine, and 4% are among those who received the recommended two doses.

  • As of February 28, 2026, the US has recorded 1,136 measles cases.
  • In 2025, the US recorded 2,281 measles cases, the highest number in 33 years.
  • In 2019, the US recorded 1,274 measles cases, the last time cases rose above 1,000.

The players

Centers for Disease Control and Prevention (CDC)

The leading national public health institute in the United States that conducts research and provides information to the public about health-related topics.

South Carolina Department of Health

The state health department responsible for monitoring and responding to the measles outbreak in South Carolina.

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What’s next

Public health officials are working to address the decline in vaccination rates and implement strategies to improve vaccination coverage and maintain herd immunity.

The takeaway

The resurgence of measles cases in the US highlights the importance of maintaining high vaccination rates to protect vulnerable populations and prevent the spread of this highly contagious disease. The decline in vaccination rates in recent years is a concerning trend that requires immediate action from public health authorities.