Before revision: Medical officer of health, medical 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: , chief health officer, chief public health officerMedical officer of health, medical 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.