Becomes even less clear that you're going to be protected by the ventilation systems, and i would say for any of my patients who are concerned about putting themselves at risk maybe because they are elderly and compromised, maybe they can't get vaccinated or they can't mount a great response to vaccination, right? a lot of people with immune compromise don't really do so great with the vaccine. anybody like that, why not continue to wear an n-95? they're more comfortable now, they're widely available. it really is -- there's no down side to it, and that's really what i've been trying to convey...