“If you have any symptoms of illness at all: stay home, don’t participate in activities,” Salt Lake County health officials said in a news release this week.
So far this year, 28 cases have been confirmed in the county, said Nicholas Rupp, a spokesperson for the Salt Lake County Health Department.
While that number may not seem high, he said, there were only four confirmed cases in all of 2025. Nearly all have occurred in people who have not received the measles, mumps rubella (MMR) vaccine, Rupp said…