Utah’s measles outbreak has picked up speed in recent weeks, bringing the total number of reported cases to 559 since it began in June 2025, according to the Utah Department of Health and Human Services.

In the first three months of this year alone, 362 cases were recorded, nearly double the 197 reported in all of 2025, according to the state’s online database tracking the outbreak.

Nearly 40% of this year’s infections, or 142, were reported within the past three weeks.

The majority of cases remain concentrated in southwest Utah, which has recorded 242 infections since June. Utah County follows at 87 confirmed cases, then Salt Lake County at 60, the state data shows.

Utah now ranks second in the nation for reported measles cases, behind South Carolina, which has reported 668 cases this year, according to the U.S. Centers for Disease Control and Prevention.

The best way to protect against the virus is to get vaccinated, state health officials have said. Most of those contracting the virus are unvaccinated, they said, but about 10% have received at least one dose of the measles, mumps and rubella vaccine.

At a news conference last month, a nurse practitioner from southern Utah shared that many of her patients and their families have underestimated how severe the virus can be.

While early cases were largely linked to schools and school-related activities, the state health department has since added several grocery stores, a meetinghouse of The Church of Jesus Christ of Latter-day Saints and a Latter-day Saint temple open house to the list of places where people may have been exposed.

Those sites include a Walmart Supercenter in Centerville and several locations in Cedar City, including a Walmart, Smith’s, Natural Grocers, Ross Dress for Less and Bristlecone Coffee Shop.

In Utah County, exposure sites range from a Walmart Supercenter and a Trader Joe’s in Orem to a open house for the Lindon Utah Temple. In Washington County, they extend to a Walmart distribution center and a Latter-day Saint meetinghouse.

A full list of exposure locations and when people may have been at risk is available on the state health department’s website.