[vpilcx]

they were designed to be disposable, but when they were in short supply at the start of the pandemic, medical professionals were wearing them up to a month. There was a study that you could treat them with, I think, UV light, oh no wait, it was put them in the oven at a certain temperature, to extend their viability up to a certain point, but I think practically, most people switch off every week or so unless in extremely high risk situations.