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@SaskiaPopescu @jeromeusa @ShellyMBoulder It’s perfectly w/in epidemiologists’ lanes to say clinical trial evidence is needed before we can say HEPA filters actually reduce transmission/cases. No one’s questioning whether they improve indoor air quality. The ? is whether they prevent COVID cases. Can’t say w/o trials.
@SaskiaPopescu @jeromeusa @ShellyMBoulder Engineers’ lane is about what diff filtration systems do/don’t do wrt affecting particles in the air. Epidemiologists’ lane is about whether those changes to air particles actually results in any significant change to transmission of the actual disease. You need trials to know.
@SaskiaPopescu @jeromeusa @ShellyMBoulder Sure, would be great to replace all indoor systems (schools, offices, etc) w HEPA filters to improve overall indoor air quality, independent of Covid. But for places deciding on filtration SPECIFIC to Covid, it’s intellectually dishonest to say it’ll reduce cases until it’s shown
@SaskiaPopescu @jeromeusa @ShellyMBoulder Cost effectiveness is an essential part of that decision making process & $ spent on 1 intervention means less $ spent on another, so we absolutely must have clinical trial data b4 suggesting 1000s of schools spend taxpayer $ on filters—& then claim school is safe to attend.
@SaskiaPopescu @jeromeusa @ShellyMBoulder That’s @eliowa’a point, & he’s absolutely right. I’m in Texas & not letting my kids attend school bc it’s not safe yet. If schools installed HEPA filters & tried to persuade me it’s now safer for my kids to attend class, you’re damn right I’d demand clinical trial evidence.
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