What Happened

As of May 7, 2026, the Centers for Disease Control and Prevention (CDC) reported 1,842 confirmed measles cases in the United States for the year, with South Carolina among the affected states. Despite the outbreak, no health alert has been issued for South Carolina, which raises concerns about the elimination status of measles in the region. The CDC continues to monitor the situation closely, emphasizing the importance of vaccination and public health measures to control the spread of the virus.

Why It Matters

Measles is a highly contagious viral disease that can lead to severe complications, including pneumonia and encephalitis, particularly in unvaccinated populations. The CDC's report indicates a significant rise in cases, with 1,830 cases attributed to outbreaks across 39 jurisdictions, including South Carolina. The lack of a health alert may hinder timely public health responses and vaccination efforts, potentially putting at risk the elimination status of measles in the U.S. Clinicians must remain vigilant in identifying and reporting suspected cases to prevent further spread. The current outbreak underscores the ongoing challenges of maintaining high vaccination coverage amidst misinformation and vaccine hesitancy.

What Changed

  • CDC confirmed a total of 1,842 measles cases in the U.S. in 2026, with South Carolina reporting cases among its jurisdiction [1].
  • The outbreak includes 25 new outbreaks reported this year, with 93% of cases outbreak-associated [1].
  • South Carolina has not issued a health alert despite the rising number of cases, which may affect local public health responses [1].
  • The CDC continues to recommend that all residents be up to date on their MMR vaccinations, especially before international travel [1].
  • The vaccination coverage remains critical as the majority of cases are among individuals who are unvaccinated or have unknown vaccination status [1].

What This Means for Your Practice

Healthcare providers in South Carolina and surrounding areas should be proactive in assessing vaccination status among patients, particularly children and travelers. Clinicians should ensure that patients are up to date with their measles, mumps, and rubella (MMR) vaccinations, as this is the most effective method of preventing measles. Additionally, providers should educate patients about the symptoms of measles and the importance of reporting suspected cases to local health authorities. Given the current outbreak, it is crucial for healthcare professionals to remain vigilant and prepared to implement infection control measures. How can clinicians effectively address vaccine hesitancy in their practice to improve vaccination rates?

Sources and Further Reading

[1] Centers for Disease Control and Prevention — Measles Cases and Outbreaks | Measles (Rubeola) | CDC. May 8, 2026. URL: https://www.cdc.gov/measles/data-research/index.html

[2] Centers for Disease Control and Prevention — Learn how CFA uses modeling to support response to outbreaks. | CDC. URL: https://www.cdc.gov/forecast-outbreak-analytics/our-work/outbreak-response-modeling.html

[3] Centers for Disease Control and Prevention — Expanding Measles Outbreak in the United States and Guidance for the Upcoming Travel Season | HAN | CDC. URL: https://www.cdc.gov/han/php/notices/han00522.html