that people get contagious long before they show symptoms
I don't think that's correct. Pre-symptomatic phase is supposed to be about 2-3 days. I wouldn't describe that as 'long' before they show symptoms.
I don't think that's correct. Pre-symptomatic phase is supposed to be about 2-3 days. I wouldn't describe that as 'long' before they show symptoms.
In the US, people are going to work (or other events) WITH positive test results. Some because they won't get paid otherwise, others because they want to make a political statement, and some because they're ... well, I dunno why...
So, yes, even having people stay home after a positive test would be helpful, because currently, they aren't even doing that.