You don’t take workers off the plant floor unless they are critically ill.
Italy is going through this right now with medical staff.
You work unless you are so sick you can’t work.
They assume everyone is infected, so no point in testing anyone.
Are you watching Lookner? 9 cases on the Faroe Island, Denmark. That island is out in the big middle of nothing on the way to Iceland. They should have shut the island down weeks ago. Easy to contain with a major food shipment at the beginning and then rations.