The thing is, you could walk into a cafe, store, bank, etc and there could be 10 people in there that are all carriers. And yet IF all of you followed proper protocols your chance of contracting it are near zero. The chance of everybody doing that is also near zero.I think this is the case for most things. When do we know it's OK to go out and sit down in a cafe? When can we feel safe even going to the bank? Or buying shoes?