The advice was given today by the Centers for Disease Control and Prevention.

Includes "large events and mass gatherings including conferences, festivals, parades, concerts, sporting events, weddings, and other types of assemblies."

The current order in Michigan bans gatherings over 250 people, but the CDC states, "this recommendation is not intended to supersede the advice of local public health officials."

There are other exceptions.

The CDC announcement:

For the next 8 weeks, organizers (whether groups or individuals) cancel or postpone in-person events that consist of 50 people or more throughout the United States.

Events of any size should only be continued if they can be carried out with adherence to guidelines for protecting vulnerable populationshand hygiene, and social distancing.  When feasible, organizers could modify events to be virtual.

This recommendation does not apply to the day to day operation of organizations such as schools, institutes of higher learning, or businessesThis recommendation is made in an attempt to reduce introduction of the virus into new communities and to slow the spread of infection in communities already affected by the virus.  This recommendation is not intended to supersede the advice of local public health officials.