hypothetically - a guy at work rings in Monday morning stating he has Coronavirus. Everybody at work then self isolates for 1 or 2 wks.
Come the day everyone is out of self isolation, they go to the shops for much needed food/supplies, walks the dog, meets up with friends, go back to work.
Within the week they hear that a friend they saw just the other day has now got Coronavirus.
Do I and all my colleagues and self isolate AGAIN?
And is so, wont this keep happening?
Therefore making being off work etc longer that just the recommended 2 wks