Sorry if I was unclear. ASTM3s do not provide self protection. They are estimated to reduce ambient virion uptake by about 2/3 - which just isn’t enough to make

Sorry if I was unclear. ASTM3s do not provide self protection. They are estimated to reduce ambient virion uptake by about 2/3 - which just isn’t enough to make a meaningful difference most of the time, as 1/3 of the usual droplet output is already more than is needed to cause infection.