The South Carolina Measles Outbreak Is Slowing Down

"We remain concerned and must be mindful of the fact that we can see cases increase again from the low number that we're seeing now. We are very hopeful that the downward trend continues, but we have to be vigilant about the risk that we can see another surge."

"The South Carolina outbreak is the largest measles outbreak in the US in more than 30 years, according to data from the Centers for Disease Control and Prevention. The CDC has confirmed 1,281 measles cases across the country this year, as of March 5. That is already more than half of the documented cases in 2025, which totaled 2,283."

"Measles was declared eliminated in the US in 2000, a status attained when there has been no ongoing transmission within the country for longer than a year. Even with cases in South Carolina abating, the US is now at risk of losing its measles elimination status. According to the CDC, there have been 12 outbreaks in the US this year, including ones in Arizona, Texas, and Utah."

South Carolina is experiencing a significant decline in measles cases, with weekly infections dropping from 200 in mid-January to approximately 10 currently. The state's outbreak represents the largest measles outbreak in the United States in over 30 years. Beginning with a handful of cases in October centered in Spartanburg County, the outbreak accelerated during winter holidays due to low vaccination rates in schools and social gatherings. Churches have also been major transmission sites. Despite the downward trend, health officials remain cautious about potential resurgence during spring break travel. The US has recorded 1,281 measles cases as of March 5, already exceeding half of 2025's total cases, with 12 outbreaks occurring nationwide, jeopardizing the country's measles elimination status achieved in 2000.

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