Before revision: Medical officer of health, medical health officer, chief health officer, chief public health officer or district medical officer, is a title and commonly used for the senior government official of a health department or agency , usually at a municipal, county/district, state/province, or regional level.
After revision: A medical officer of health, medical health officer, chief health officer, chief public health officer or district medical officer, is the title commonly used for the senior government official of a health department also known as a , usually at a municipal, county/district, state/province, or regional level.