5. Where the commissioner has reasonable grounds to believe a public health emergency exists, the commissioner shall: ascertain the existence of cases of an illness or health condition that may be potential causes of a public health emergency; investigate all such cases for sources of infection and ensure that they are subject to proper control measures; and define the distribution of the illness or health condition. To fulfill these duties, the commissioner shall identify exposed individuals as follows:
a. The commissioner shall identify individuals thought to have been exposed to an illness or health condition that may be a potential cause of a public health emergency.
b. The commissioner shall counsel and interview such individuals where needed to assist in the positive identification of exposed individuals and develop information relating to the source and spread of the illness or health condition. The information shall include the name and address, including city and county, of any person from whom the illness or health condition may have been contracted and to whom the illness or health condition may have spread.