Measles is a highly contagious virus and spreads easily through the air when an infected person breaths, coughs or sneezes. The virus can stay in the air two hours after an infected person has left.
Symptoms typically appear seven to 14 days after exposure and include:
- High fever
- Cough
- Runny nose
- Red eyes
- A distinctive rash
While many recover without problems, measles can lead to serious complications, especially in very young children and people with weakened immune systems.
Note: If you or a family member are experiencing measles symptoms, please call your primary care provider immediately. It is important to call your doctor before going in so precautions can be taken to protect doctor’s office staff and people in the waiting room.
About Measles in Idaho
2025 Idaho Resident Measles Cases
Only counties with cases reported among residents of the county are listed.
| County of Residence | Cases |
|---|---|
| Bonner | 1 |
| Bonneville | 1 |
| Kootenai | 1 |
Last updated: 8/20/2025. The chart will be updated as cases are reported.