Symptoms of COVID-19 include fever, shortness of breath, and lower respiratory distress, and may appear 2-14 days after exposure. For more on keeping yourself and your loved ones healthy, visit the Maine CDC. COVID-19 Testing. Free testing for COVID-19 is widely available in Maine. The changes to Covid-19 policies come amid an increase in infections, which city health officials warn could hit 8,000 in the coming weeks. During their.