A old NY times article details what happened last spring time.
In an attempt to stop the spread of the coronavirus, a vast majority of states and the Navajo Nation have given directives, affecting more than nine in 10 U.S. residents.
www.nytimes.com
One explain of what state was ordering:
California About 39.6 million people
California, America’s most populous state, was the first to order all residents to stay home. Others quickly followed suit. “This is not a permanent state, this is a moment in time,” Gov. Gavin Newsom said. “We will look back at these decisions as pivotal.”
Stay at home, effective March 19