(Portland, OR) -- A measles outbreak in southwest Washington might be threatening NBA fans in the Portland area. Public health officials say people might have been exposed to measles at the Portland Trail Blazers game on January 11th. Health officials say the Moda Center, where the Blazers play, is one of two-dozen public places where people could have been exposed to the disease. Others include schools, health care centers, the Northeast Portland Costco, and Portland International Airport. At least 20 children and one adult in southwest Washington have come down with measles over the past month.