Wis. Stat. 252.03
Scope of Practice: Local Health Officer
A local health officer can forbid public gatherings when necessary to control outbreaks or epidemics. A local health officer can also take all necessary measures to prevent, suppress, and control communicable diseases and must report on actions taken.
Duties of Local Health Officers
(1) Every local health officer, upon the appearance of any communicable disease in his or her territory, shall immediately investigate all the circumstances and make a full report to the appropriate governing body and also to the department. The local health officer shall promptly take all measures necessary to prevent, suppress and control communicable diseases, and shall report to the appropriate governing body the progress of the communicable diseases and the measures used against them, as needed to keep the appropriate governing body fully informed, or at such intervals as the secretary may direct. The local health officer may inspect schools and other public buildings within his or her jurisdiction as needed to determine whether the buildings are kept in a sanitary condition. (2) Local health officers may do what is reasonable and necessary for the prevention and suppression of disease; may forbid public gatherings when deemed necessary to control outbreaks or epidemics and shall advise the department of measures taken. (3) If the local authorities fail to enforce the communicable disease statutes and rules, the department shall take charge, and expenses thus incurred shall be paid by the county or municipality. (4) No person may interfere with the investigation under this chapter of any place or its occupants by local health officers or their assistants.