The Vancouver, Wash. measles outbreak continued to expand Monday, and health officials announced that visitors to the Oregon Museum of Science and Industry may have been exposed.

Clark County Public Health officials added OMSI to the list of exposure sites, saying anyone who visited on Saturday, Jan. 19 could have been exposed. That means that anyone without a measles vaccination could have been infected if they went to the popular children's museum at 1945 Southeast Water Ave.

The health office also added New Life Mission Church in outer Northeast Portland to the list of possible exposure sites.

Late last week, Oregon officials announced the first confirmed measles case in Multnomah County. Today's announcement adds to the list of places where Portlanders could have been exposed: An infected person had attended a Portland Trail Blazers game on Jan. 11.

Clark County, Wash. officials say the number of confirmed measles cases has grown to 35, with another 11 possible cases. The spread of the disease over the past three weeks has been fueled by low immunization rates in Oregon and Washington.