An act or omission of a mobile intensive care paramedic done or omitted in good faith while rendering emergency service to a person who is in need of immediate aid in order to avoid serious harm or loss of life does not impose any liability upon the mobile intensive care paramedic, the supervising physician, a hospital, the officers, members of the staff, nurses, or other employees of a hospital or upon a federal, state, borough, city or other local governmental unit or upon other employees of a governmental unit; however, this section does not relieve a physician or a hospital of a duty otherwise imposed by law upon the physician or hospital for the designation or training of a mobile intensive care paramedic or for the provision or maintenance of equipment to be used by the mobile intensive care paramedic.