Iowa’s measles outbreak continues to spread, with the Iowa Department of Health and Human Services reporting 42 confirmed cases statewide.
According to the latest state update, 40 of the 42 individuals infected were either unvaccinated or had an unknown vaccination status. Two cases involved individuals who had received at least one dose of the measles vaccine.
Children and teenagers continue to make up the majority of reported infections. Four cases involve children under the age of five, while 24 cases involve individuals between the ages of five and 19. The remaining 14 cases involve adults age 20 and older.
Southern Iowa remains the primary area of concern, although infections have also been reported in other parts of the state. Health officials report that 37 cases were acquired within Iowa, while five were associated with travel.
Despite the growing number of infections, no public exposure locations have been identified in Iowa during the past four weeks.
Measles is a highly contagious airborne disease that can spread when an infected person breathes, coughs or sneezes. Symptoms typically include fever, coughing, a runny nose, red or watery eyes, and a rash. Symptoms can appear anywhere from seven to 21 days after exposure.
Health officials are reminding Iowans to be aware of symptoms and review their vaccination status. Anyone who suspects they may have measles should contact their healthcare provider before arriving at a medical facility to help prevent exposing others.
The increase is significant compared to last year, when Iowa reported just nine confirmed measles cases throughout all of 2025.
The Iowa Department of Health and Human Services continues to monitor the outbreak and update confirmed case numbers weekly.
Source: Iowa Department of Health and Human Services.
