If you use a good mask like the Aura and you're not a healthcare worker you don't need a fit-test.

Non-experts get an average fit factor of 88, well over the recommended goal of 10. (In healthcare the goal is 100, to provide a 10x safety margin.)https://t.co/5jc5gGiJOb

— Jeremy Howard (@jeremyphoward) July 8, 2022