(Salem, OR) -- More unvaccinated children have come down with Measles in Oregon. Two cases were confirmed last week in Marion County. Public health officials say there are no known public exposures. In June, two cases were reported in a Clackamas County household. The OHA believes the adult and child were exposed to the disease while in Marion County, but didn't know exactly where. Measles is highly contagious and spreads through the air when an infected person coughs or sneezes.