There was a woman on my BNE-CBR flight a couple of days ago (note 2 large population centres with zero confirmed or suspected cases of the virus), wearing an FFP3 mask but badly- it would have been leaking air both from under her chin and over the cheekbones
if you are going to do the mask thing, at least have the dignity to do it properly
-FFP3s and N95s have 2 straps- one needs to go “high” on the back of your head and the other “low” towards the nape of the neck. If the 2 bands are together the mask is not fitted correctly and is useless
-you need to adjust the metal band over the bridge of the nose to create a decent seal
- if it doesn’t “move” when you breathe in and out (it kind of sucks in on inspiration and returns to a neutral position on expiration), it is not fitted properly and is useless. You should not be able to feel leaks of air around the edges of the mask
-the mask won’t block smells but should block tastes- the old way of testing whether you’d fit it properly was to make you wear a hood and then spray bitrex at increasing concentrations. There is a level at which this is considered acceptable but broadly speaking, you shouldn’t be able to taste anything with the mask on
here endeth my PSA