(Portland, OR) -- Doctors in the Portland area have been told to watch for measles symptoms. Measles is a highly contagious respiratory infection. A family of six people in Clark and Wahkiakum counties in Washington state have confirmed cases of measles. They're isolating at home. Two incubation periods have gone by, but health officials are concerned the infection could spread to people who aren't vaccinated. Measles symptoms include coughing, congestion, red eyes and a rash. If you have those symptoms, call your doctor before going in to be checked.