Measles outbreaks in both Utah and Arizona are growing, with Utah now having 102 cases, including eight students from Wasatch High School in Wasatch County in the northern part of the state, east of Provo.
The Salt Lake Tribune reported this week that Wasatch County has some of the lowest vaccination rates in the state; according to 2024-25 school year data, 13% of seventh graders in the county lacked documentation showing they had received the two-dose measles, mumps, and rubella (MMR) vaccine.
Arizona also reported 16 more measles cases, for a new total of 153. All new cases are in Mohave County, which, along with Southwest Utah, is the new epicenter of measles activity in the United States.
US nears 1,800 cases
The Centers for Disease Control and Prevention (CDC) also updated national measles numbers. The 2025 total is now 1,798 confirmed cases. There have been 46 outbreaks, accounting for 87% of cases.