Clark County Public Health is investigating two confirmed cases of measles and 11 suspected cases, all among children.
These cases are in addition to one confirmed case earlier this month.
The two new confirmed cases are among unvaccinated children who visited two public locations while they were contagious.
People who visited the Church of Truth in Vancouver between 11 a.m. and 4 p.m on Sunday, Jan. 6, or people who were in Concourse D or the Delta Sky Lounge at the Portland International Airport on Monday, Jan. 7, between 10:45 a.m. and 3:45 p.m. may have been exposed.
Anyone with questions about measles infection or vaccine is encouraged to contact their doctor or county health department.