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April 22, 2025
Measles case associated with international travel in a King County infant
Actions requested
➜ This health advisory is also available in PDF format (126 KB).
Be aware of a new confirmed measles case in an infant who traveled internationally.
- Secondary cases would most likely occur between April 22 – May 11, 2025
- MMR vaccination remains the most important tool for preventing measles infections and spread from imported cases
- Refer to Measles Guidance for Healthcare Providers for more details on immediate isolation, notification, testing, and management of patients with suspected measles
- Refer to the 4/17/2025 Health Advisory for previous measles case information and exposure locations
Background
Note: Exposure dates and times at Seattle Children's revised on 4/23/25.
Public Health is investigating a case of measles in an infant with exposure during international travel. This is the 5th case of measles in a Washington resident in 2025, three of which have been infants. The infant was at the following locations during their infectious period:
| Date | Time | Location |
|---|---|---|
| 4/15/25 | 4:50 pm - 7:45 pm |
Seattle-Tacoma International Airport
|
| 4/17/25 | 8:45 am - 5:30 pm - |
Seattle Children's Emergency Department
|
| 4/17/25 | 5:30 pm - |
Seattle Children’s Emergency Department
|
(Corrected information) 4/18/25 |
11:50 am - 3:30 pm |
Seattle Children’s Emergency Department
|
(Corrected information) 4/20/25 |
12:05 pm - 2:25 pm |
Seattle Children’s Emergency Department
|
There is no ongoing risk for measles exposure at these locations.