The Southwest Health District is concerned about low MMR vaccine coverage and the risk of measles spreading in schools and communities.

The district recently sent letters to parents at Vallivue high and middle schools in Caldwell notifying them of potential measles exposure. An unvaccinated child in Canyon County contracted a probable measles case during out-of-state travel over winter break, according to a statement the health district sent to EdNews.

Epidemiologists consider it to be a probable case because they do not have a laboratory confirmation. The child attended Vallivue Middle School and their sibling attended Vallivue High before showing symptoms. The district is unaware of any other students or staff with measles symptoms.

The district’s main concern is low vaccine coverage, according to a statement from spokesperson Monique Evancic. Outbreaks can be prevented if at least 95% of kids are vaccinated, but Idaho has the lowest MMR vaccine rate in the nation.

Last school year, 78.5% of Idaho kindergarteners were covered by the MMR vaccine, according to data from the Centers for Disease Control and Prevention

The Idaho Department of Health and Welfare has reported five measles cases this year and 19 cases since Aug. 4.

The MMR vaccination is effective in protecting against measles and severe complications from measles, according to the Southwest Health District. If parents have additional questions, they can contact the district’s epidemiology line at 208-455-5442.