I've shown you this before, but you choose to disregard it as it doesn't fit
your agenda.
"Your cloth face covering may protect them. Their cloth face covering
may protect you."
Note the word "may".
We may have snow in Ft Myers but I am not buying a snow shovel.
Anything that starts right out with "may work" does not sound like a
standard in any scientific sense.
Of you showed up at any OSHA regulated work space with a bandanna on
your face, they would kick you out. (to avoid a fine) OSHA does have
standards about what constitutes a mask.
You are too binary in your thinking. Nobody I've heard claims a cloth
mask *prevents* the spread of the covid-19 virus. It *does* reduce the
chances however. The whole risk issue is based on statistics, not
absolute science like you are trying to make it out to be.
What statistics?
I haven't seen anything but contradictory and incomplete studies along
with a lot of unfounded opinion using words like "may" and "might".
"Mask mandatory" places are doing as bad or worse than places where
few people wear masks.
You accept the 60% infected as being the magic "herd immunity"
target, yet it also is based on a statistical analysis of the
"R-naught" factor.
Actually I think I was citing the 70% guess but we really don't know.