Our staff care for patients with COVID-19 in hospitals, homes, and even in the skies over Maine. These are their stories. Northern Light Mercy Hospital to host COVID-19 vaccine clinic for ages 5-11. Release Date: 11/05/2021. Online registration will open soon for a November 13 clinic that will provide Pfizer's COVID-19 vaccine to those aged 5-11Care Centers & Services‧About Us‧Patients & Visitors‧Providers‧Locations‧Northern Light Mercy Hospital.