Public Health – Seattle & King County has confirmed a new measles case in a King County adult who may have exposed others to the virus at several locations in Kent, Renton, and Tukwila.
Officials said the individual was on the same flight as another person with a confirmed measles case announced Oct. 17. They believe this latest case was exposed on that flight. It marks the 12th measles case in Washington residents this year, along with several additional cases in travelers who visited King County.
The adult had been vaccinated against measles, health officials said. Nationally, 92 percent of measles cases this year have occurred in unvaccinated people, with only 4 percent in those who received both doses of the MMR vaccine.
“While it’s possible for someone who’s been vaccinated to get measles, it’s rare,” said Dr. Sandra J. Valenciano, Health Officer for Public Health – Seattle & King County. “Vaccinated people who get measles are generally less likely to spread it to others and less likely to have severe outcomes. The measles vaccine remains a very effective tool and has been safely used for over 50 years.”
Possible exposure sites
Health officials said the individual visited the following locations during their infectious period. The measles virus can remain in the air for up to two hours after an infected person leaves the area:
| DATE | TIME | LOCATION | WATCH FOR SYMPTOMS UNTIL |
|---|---|---|---|
| 10/22/25 | 7 AM – 9 PM | Toyota of Renton, 150 SW 7th St, Renton, WA 98057 | 10/29/25 – 11/13/25 |
| 10/23/25 | 7 AM – 9 PM | Toyota of Renton, 150 SW 7th St, Renton, WA 98057 | 10/30/25 – 11/13/25 |
| 10/24/25 | 7 AM – 9 PM | Toyota of Renton, 150 SW 7th St, Renton, WA 98057 | 10/31/25 – 11/14/25 |
| 10/25/25 | 4 PM – 7 PM | YangGuoFu MalaTang, 16860 Southcenter Pkwy, Tukwila, WA 98188 | 11/01/25 – 11/15/25 |
| 10/26/25 | 11 AM – 3 PM | ShoWare Center, Disney on Ice: Let’s Dance, 625 W James St, Kent, WA 98032 | 11/02/25 – 11/16/25 |
| 10/26/25 – 10/27/25 | 8:10 PM – 2 AM | Valley Medical Center Emergency Department entrance and waiting rooms, 400 S 43rd St, Renton, WA 98055 | 11/02/25 – 11/17/25 |
What to do if you may have been exposed
Public Health said most people in the region are immune to measles through vaccination, so the overall risk is low. However, anyone who was at the listed locations should check their vaccination status and watch for symptoms such as fever, rash, cough, runny nose, or red, watery eyes.
Health officials recommend calling a healthcare provider if symptoms develop rather than visiting in person, to avoid potentially exposing others. The most likely timeframe for illness to appear is Oct. 29 through Nov. 17.
High-risk groups include infants, children under 5, adults over 20, pregnant people, and those with weakened immune systems. Measles can cause complications such as pneumonia, ear infections, diarrhea, and in rare cases, brain inflammation or death.
About measles
Measles is a highly contagious virus spread through the air when an infected person coughs or sneezes. Up to 9 out of 10 people without immunity can become infected after exposure. Two doses of the MMR vaccine are about 97 percent effective and provide long-lasting protection.
For more information, including where to get vaccinated, visit www.kingcounty.gov/measles.
