I don't believe surgical masks do any filtration. They're simply a line-of-sight barrier. There's no seal, so hardly any air will be forced through it. I'd exp

I don't believe surgical masks do any filtration. They're simply a line-of-sight barrier. There's no seal, so hardly any air will be forced through it. I'd expect a respirator valve to be at least as effective as that. If you were really worried, you could always wear a surgical mask over your respirator...