Anna Miriamsdochter@nuintari @mwl someone shared this in 2021 or so and it’s the most educational thing I’ve seen since the start of the pandemic until now.
4censord 
@venite @nuintari @mwl that only really applies for the fabric masks though, and specifically masks without an exhale valve.
if you are wearing a respirator style mask, then it should filter out almost everything for your inhale air, but nothing for your exhale air
Luke (Shiv)
Tim Hergert
Stooryduster