The newly diagnosed cases each involve unvaccinated children between 1 and 10 years old, bringing the count of cases involving unvaccinated patients to 30, according to Clark County Public Health.
Washington Gov. Jay Inslee declared a state of emergency due to the outbreak Jan. 25.
The measles outbreak spread to Oregon Jan. 25, with one confirmed case in Multnomah County.
Health officials listed several locations in Vancouver, Wash., where people could have been exposed, including a restaurant and medical office.
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