Wyoming Confirms 3rd Measles Case of 2026 in Teton County, Flags 4 Exposure Sites
Updated
Updated · Buckrail · Jul 11
Wyoming Confirms 3rd Measles Case of 2026 in Teton County, Flags 4 Exposure Sites
3 articles · Updated · Buckrail · Jul 11
Summary
A second Teton County measles infection was confirmed in an unvaccinated adult, lifting Wyoming’s 2026 total to three cases after a Fremont County case this spring.
Four possible exposure sites were identified in Jackson and Grand Teton National Park—Smith’s, Wendy’s, Colter Bay Convenience Store and the Colter Bay Cabin Office—covering July 5 and July 7.
WDH said exposed people should monitor for symptoms for 21 days and consider avoiding crowded places and high-risk settings, while the state and National Park Service conduct contact tracing.
Measles can linger in the air for up to two hours and can cause pneumonia or encephalitis; officials said two MMR doses are about 97% effective.
The new case follows Teton County’s first measles report in late June, while Wyoming recorded 15 cases in 2025—the state’s first since 2010.