Almost half of all Americans have been ordered to stay at home. This map shows which cities and states are under lockdown.

Ruobing Su/Business Insider 22 states have issued stay-at-home orders, encouraging isolation measures to prevent the spread of the coronavirus. Other metro areas, such as Anchorage, Alaska; Philadelphia, Pennsylvania; and Houston and Dallas, Texas; are also under stay-at-home orders. In total, that brings nearly half of America's population under some form of lockdown. Visit Business Insider's homepage for more stories. As of Thursday, 22 US states have issued stay-at-home orders, asking residen...