One of the local oncology wards is running out of N-95 masks. They are cutting masks out of cloth (to a pattern supplied by the CDC!) for the folks not in direct contact with patients.
I asked my contact if they had ever considered sterilizing the nominally disposable masks by placing them in a refrigerator with an ozone generator running.
Virus is relatively fragile. Ozone is a gas and permeates.
I believe it comes down to a time-concentration-temperature calc.
I volunteered the ERJ ozone generator if they want to give it a try.