Look, y'all.
In a crowded room, THERE IS NO SUCH THING AS CLEAN AIR.
Every time someone exhales their nasty, stank ass, virus-ridden breath, your precious clean air is gone. GONE.
Those virus-laden aerosols need to go through a window or get trapped by a filter BEFORE they reach someone's face. Good luck with that!
The so-called covid-aware community needs to get a fucking grip. Like, right now.
SWISS.
CHEESE.