Gas mask and filters also have been run out ... Very good idea but finding filters still in code and that will be sold to civies is very hard ..I have found few places that will sell non LEO/GOV gas mask gear .. Most that do stock it are old past safe date for disaple onlyMrs OldChap would remind us that such face coverings only prevent the intake / outflow of large droplets, not smaller particles - which can also infect. You must go to an N95 (or higher rated) close-fitting mask to be completely protected / isolated. Those N95 masks should be reserved for healthcare workers.
Now if we had only been wise like some preppers and bought full up NBC kits! Of course wearing one for any length of time is a trying experience for the soul.
The one I have found get there from the EU and former sovit block ..Which means now well back orders for weeks or more