Syag> Because it’s not 95%. I wish it was but it’s not.
an important number is not for one person, but the public health effect
surgical mask protection may be 50% for both sides, but this may decrease transmission rate R_t
from, say, 1.1 to 0.9. That is a difference between increasing and decreasing pandemic. As Rambam says, you should think that the world is 50-50 and it is up to you…