Thank god! I should be ok if I keep my mask zipper closed then you're saying??!!Japanese commuters have worn masks for a long long time, since the early Edo period when the subway was largely horse drawn conveyances. The masks were mostly to filter out the obnoxious effluvium from horse farts.
The masks and attitude of those wearing masks will be sufficient deterrent for any airboene virus.
Too many people drinking Mexican beer.
I wonder if corona sales are down!