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The number of Americans under virtual lockdown grew Saturday to over 80 million, with New Jersey joining the list of states issuing a stay-at-home order or other sweeping mandates to fight the spread of the new coronavirus.

“We must flatten the curve and ensure residents are practicing social distancing," New Jersey Gov. Phil Murphy said, adding, “Even with this order in effect … life in New Jersey does not have to come to a complete standstill.”

New Jersey's stay-at-home order applies to nearly all of its 9 million residents. It comes after Illinois issued a similar mandate Friday for its 13 million residents and following California's stay-at-home order for its population of 40 million.

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In New York, with a population of over 19 million, the governor has ordered that all nonessential businesses keep their workers home. Pennsylvania's governor has also ordered that all businesses that are not "life-sustaining" close.

New York also announced Saturday that the number of coronavirus cases there now tops 10,000.

Worldwide, there are now more than 275,000 confirmed cases of the coronavirus, according to Johns Hopkins University.

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