CALDWELL, Idaho — Five confirmed measles cases within a single household in Canyon County are highlighting growing public health concerns as Idaho experiences a statewide rise in cases and declining childhood immunization rates. "Ten years ago, we had no cases of measles in the state," Hahn said. Health officials say Idaho has reported more than 20 measles cases since late 2025, including several confirmed this year. "There's no specific treatment for measles," Hahn said. The rise in cases comes as vaccination rates among school-age children continue to decline.