I think the evidence is so far NOT to protect you (might be a bit) but to protect AGAINST you. Hence the advise so far is if you have the sickness you should.

I think the evidence is so far NOT to protect you (might be a bit) but to protect AGAINST you. Hence the advise so far is if you have the sickness you should. Otherwise ... which is the BAD advise by who. From a public health and human dynamics point of view. The key issue is that you do not know you have it. And asking people to protect others as the main theme does not work. The full mask on is important as it eliminates the incentive of not having the inconvenices. And stop the spread. For work environment it is a risk and they should have some always on. Otherwise it will spread. In fact if one not on and start, the mask is the best collector of gems.