Measles infections in America have hit their highest numbers in 33 years. In 2025, cases have topped 1,900, and that number is expected to rise due to an ongoing outbreak in South Carolina.

Here’s what you need to know about America’s latest measles outbreak and why the upcoming period could spell troubling times with the disease.

What’s happened?

Earlier this week, the South Carolina Department of Public Health (DPH) announced 27 new cases of measles in the state since the previous Friday, raising the total number of active measles cases in the southeastern state to 111.

Due to the outbreak, there are currently 254 people in quarantine, with another 16 individuals in isolation in an effort to prevent the spread of the potentially deadly disease through the community.

Of the new cases

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