Measles is caused by a virus that is easily spread through the air and settles on surfaces. While most people recover from measles, some become seriously ill and can die from it. This is especially true for children younger than age 5 and people with weakened immune systems. The best way to prevent measles is to get the vaccine.

Click here to learn what to do if you think your child has measles.

Click here to view the measles factsheet.

Click here to view the measles infographic.

Click here to learn about the measles vaccine.

News: Third Measles Case of 2026 Confirmed by Wyoming Department of Health

News: Second Measles Case of 2026 Confirmed by Wyoming Department of Health

News: First Wyoming Measles Case of 2026 Reported from Fremont County

News: Measles Case Confirmed in Park County

News: Five Measles Cases Identified in Fremont County, Bringing Wyoming’s Total to Fourteen

News: Four Additional Measles Cases Confirmed in Carbon County

News: Third Measles Case Confirmed in Carbon County

News: Second Measles Case Confirmed in Niobrara County

News: Measles Case Confirmed in Natrona County

If you were at these locations during these times, you may have been exposed to measles:

• Target Jackson Hole, 510 S Highway 89, Jackson, WY 83001
  • June 25, 2026, 7:00 AM through 9:30 AM
• Smith’s Food and Drug, 1425 South Highway 89, Jackson, WY 83001
  • July 5, 2026, 11:30 AM through 1:30 PM
• Wendy’s, 525 West Broadway, Jackson, WY 83001
  • July 5, 2026, 12:15 PM through 2:15 PM
• Colter Bay Convenience Store, Grand Teton National Park, 1 Colter Bay Village Road, Moran, WY 83013
  • July 7, 2026, 9:00 AM through 11:00 AM
• Colter Bay Cabin Office, Grand Teton National Park
  • July 7, 2026, 3:00 PM through Midnight

2026 Wyoming Measles Cases by County (Updated 7/13/2026)

Total reported cases: 3

Fremont: 1

Teton: 2