On Jul. 1, 2025, the Wyoming Department of Health (WDH) has confirmed a case of measles in an unvaccinated child from Natrona County. Measles is a highly contagious infection that can cause severe illness.

The source of the child’s measles exposure was not identified. This case is the first reported in Wyoming since 2010. The child was briefly in the waiting room at Banner Wyoming Medical Center Emergency Department, resulting in a potential exposure.

The WDH is working with Banner Wyoming Medical Center to notify these individuals. “We are asking individuals who were potentially exposed to self-monitor for measles symptoms for 21 days past the exposure date, and consider avoiding crowded public places or high-risk settings such as daycare centers,” said Dr. Alexia Harrist, State Health Officer with WDH. Monitoring for symptoms is especially critical for people who have not been vaccinated with the measles, mumps, and rubella (MMR) vaccine.

Infants less than 1 year old who are too young to receive the MMR vaccine, pregnant women, and immunocompromised individuals are at higher risk for infection and severe disease; WDH recommends these individuals contact their healthcare providers regarding their potential measles exposure. If you were at this location during the exposure window and develop symptoms, immediately contact your healthcare provider by phone.

If you do not have a provider, call an urgent care center or emergency department and explain that you may have been exposed to measles. Calling ahead helps prevent additional exposures. People exposed to measles typically develop symptoms 7 to 21 days after exposure.