And this would be a total reasonable defense if they quarantine any worker who has any contact with anyone who is infected for any amount of time for 27 days.

And this would be a total reasonable defense if they quarantine any worker who has any contact with anyone who is infected for any amount of time for 27 days. But that' isn't a policy the company follows. Also they let him work during the 2 weeks he was most likely to be contagious.