A measles investigation amid a large, ongoing outbreak at the Arizona-Utah border has hit a roadblock as the first probable case identified in the Salt Lake City area refuses to work with health officials, the local health department reported this week.
There have been over 150 cases collectively across the two states, mostly in northwestern Mohave County, Arizona, and the southwest health district of Utah, in the past two months. Both areas have abysmally low vaccination rates: In Mohave County, only 78.4 percent of kindergartners in the 2024–2025 school year were vaccinated against measles, according to state records. In the southwest district of Utah, only 80.7 percent of kindergartners in the 2024–2025 school year had records of measles vaccination. Public health experts say vaccination coverage of 95 percent is necessary to keep the disease from spreading in a community.
While the outbreak has largely exploded along the border, cases are also creeping to the north, toward Salt Lake County, which encompasses the city. Utah County, which sits just south of Salt Lake County, has identified eight cases, including a new case reported today.