State health officials are worried about the spread of measles after an Oahu infant contracted the highly contagious disease in the Philippines and was infectious while traveling back to Honolulu.  Measles is spread by direct contact with mucus from the nose and throat of an infected person and through the air by respiratory droplets. It is a risk to anyone who hasn't been vaccinated.  The boy is hospitalized and recovering. State epidemiologist Dr. Sarah Park urges people who suspect they have measles to call their doctor right away and isolate themselves from others to help contain the spread of illness. According to the Health Department, the symptoms of measles generally begin about 14 days after a person is infected and may include a blotchy red rash, with a fever, cough, runny nose and red, watery eyes.