Here’s an entity that I did not know existed: The Chicago Board of Health. Here’s info from the City website:
The Chicago Board of Health formulates health policies and advises the Mayor and the Public Health Commissioner on all health issues. The Board promulgates all health regulations, including emergency regulations.
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It shall be the duty of the board of health to be well informed regarding all matters affecting the health of the citizens of Chicago. It shall formulate policies and otherwise advise the mayor of the city and the commissioner of health on all health issues.
I’ve been around for a while, and I certainly knew about the essential work of the City department called the Chicago Department of Public Health, but I wasn’t aware of this separate entity that set policy and advised the executive branch of government.