Current Measles Status in Western Washington
Last updated: Monday, February 2, 2026
Status: Active exposure alert
What parents need to know right now
- New exposure: Seattle-Tacoma International Airport — Jan. 22, 2026, between 4 p.m. and 7 p.m.
(A Concourse, Gate A12; Transit to International Arrivals Hall, Baggage Claim 22; lower-level baggage claim exit at the south end of the main terminal) - Cases reported: International traveler case reported by Public Health — Seattle & King County
- Who should take action: Unvaccinated people, infants, pregnant people, and those with weakened immune systems
- What to do: If you were at one of the locations during the times listed above, find out if you have immunity against measles. This means you have been vaccinated for measles or have had measles previously. Call your healthcare provider if you develop symptoms such as a fever or rash. To prevent possible spread to other people at the healthcare facility, do not go in person without calling first. Wear a well-fitting mask when you go.
This section is updated as new information is confirmed by county or state health officials.
What is Measles and How it Spreads
Measles is one of the most contagious diseases in the world. It spreads through the air when an infected person coughs or sneezes and can linger in a space for up to two hours after they leave.
If one person has measles, up to 9 out of 10 nearby people without immunity can become infected.
Measles Symptoms Parents Should Watch For
Symptoms usually appear 7–21 days after exposure and often start before the rash appears. Common symptoms include:
- Fever
- Cough
- Runny nose
- Red, watery eyes
- Rash (typically appears several days after fever begins)
Because people are contagious before the rash shows up, outbreaks can spread quickly — especially in schools, child care centers, and crowded indoor spaces.
When to Call a Doctor After Possible Exposure
Health officials recommend calling ahead before visiting a clinic or hospital if measles is suspected. This helps prevent exposing others in waiting rooms. Call a provider if your child:
- Has a fever and rash
- Was at a known exposure site
- Is unvaccinated and develops cold-like symptoms after possible exposure
MMR Vaccine Facts for Washington Families
The MMR vaccine (measles, mumps, rubella) is the most effective protection against measles. Health officials note:
- Two doses provide about 97% lifetime protection
- The vaccine has been safely used for decades
- Most people in Washington are protected through routine childhood vaccination
Families who are unsure about vaccination records are encouraged to contact their pediatrician or school.
What Pediatric Experts Say About Measles in Our Community
Pediatric infectious disease specialists emphasize that measles remains highly contagious but very preventable with vaccination.
In a Q&A with Seattle’s Child, a board-certified pediatrician answered common questions from local families about measles symptoms, risks, and when to seek care — including how the illness can spread before symptoms appear and why early recognition matters.
Experts remind parents that:
- Most children are protected through routine MMR vaccination, which is safe and highly effective.
- If your child might have been exposed or develops symptoms, call your provider before visiting to limit contagion.
- Vaccination not only protects your own family but slows community spread when coverage is high.
For more expert answers, read Measles in King County: A pediatric expert answers your questions.
Recent Measles Activity in Washington State
- Jan. 2026 — Snohomish County: Three child cases linked to visiting family; exposure sites included schools and a medical clinic
- Jan. 2026 — Sea-Tac Airport: International traveler exposure in A Concourse and International Arrivals Hall
- Jan. 2026 — Kittitas County: Case confirmed involving Central Washington University student
How Schools and Child Care Respond to Measles Cases
When a case is confirmed, local health departments may recommend:
- Excluding unvaccinated students temporarily
- Notifying families of possible exposure windows
- Enhanced cleaning and ventilation
- Monitoring for symptoms over the incubation period
Policies vary by district and county.
Trusted Local Health Resources for Families
- Washington State Department of Health — Measles
- Public Health — Seattle & King County
- Snohomish County Health Department
- Pierce County Public Health
Bottom Line for Parents
Measles is serious, but it’s also preventable. Staying informed, checking vaccination status, and acting quickly after possible exposure are the most effective ways families can protect their kids and community.
