Evidently this type of social distancing has been mandated before... during the 1918 outbreak of the Spanish flu.

Read about it here, courtesy of History.com:
How U.S. Cities Tried to Halt the Spread of the 1918 Spanish Flu
by David Roos
published March 11, 2020
updated March 16, 2020
Originally Posted by History.com article
How U.S. city officials responded to the Spanish flu played a critical role in how many residents lived—and died.

With all of the scientific, technological, and medical advances in the past 100 years, how much have we learned?