We know #COVIDisAirborne, spreading via inhaled aerosols.
Any mask will provide some source control, but given Delta's formidable transmissibility, it's time for #bettermasks to maximize protection for ourselves and others.
Keys to #bettermasks:
✅FILTER
✅FIT
✅FUNCTION
🧵1/
Any mask will provide some source control, but given Delta's formidable transmissibility, it's time for #bettermasks to maximize protection for ourselves and others.
Keys to #bettermasks:
✅FILTER
✅FIT
✅FUNCTION
🧵1/
https://twitter.com/ScottGottliebMD/status/1423836049688563713
☑️FILTER
🟠GOOD: A 3 ply, tightly-woven, cloth mask with a polypropylene inner layer
🟡BETTER: ASTM rated surgical masks, Level 2 or 3
🟢BEST: KN95, KF94, N95, Elastomeric Respirators
But since COVID spreads in aerosols.. we also need to #mindthegaps with a good FIT...
2/
🟠GOOD: A 3 ply, tightly-woven, cloth mask with a polypropylene inner layer
🟡BETTER: ASTM rated surgical masks, Level 2 or 3
🟢BEST: KN95, KF94, N95, Elastomeric Respirators
But since COVID spreads in aerosols.. we also need to #mindthegaps with a good FIT...
2/
☑️FIT
🟠GOOD: Thin cloth mask over a surgical mask, or use ear-saver/hair clip.
🟡BETTER: KN95/KF94 respirator with user seal-check, or mask brace on surgical mask.
🟢BEST: N95/N99/Elastomeric Respirator with user seal-check. If high-risk worker: Fit-Tested Respirator
3/
🟠GOOD: Thin cloth mask over a surgical mask, or use ear-saver/hair clip.
🟡BETTER: KN95/KF94 respirator with user seal-check, or mask brace on surgical mask.
🟢BEST: N95/N99/Elastomeric Respirator with user seal-check. If high-risk worker: Fit-Tested Respirator
3/
☑️FUNCTION
🟢Make sure your mask is breathable and comfortable!
🟡Be careful when adding layers (eg. double-masking with 2 thick masks); this could limit breathability and cause you to breath around the mask rather than through it.
4/
🟢Make sure your mask is breathable and comfortable!
🟡Be careful when adding layers (eg. double-masking with 2 thick masks); this could limit breathability and cause you to breath around the mask rather than through it.
4/
With Wild-Type SARS-CoV-2, the GOOD options above were probably sufficient, especially when combined with decent ventilation.
Unfortunately, Delta is a new beast, so we need to be aiming for BETTER and BEST masks + layer with excellent ventilation/filtration.
5/
Unfortunately, Delta is a new beast, so we need to be aiming for BETTER and BEST masks + layer with excellent ventilation/filtration.
5/
I use a KN95 earloop mask, or a N95/N99 full band mask, depending on the riskiness of the activity/environment.
High-risk workers should be wearing fit-tested respirators.
Here's a great resource for #bettermasks in 🇨🇦:
docs.google.com/document/d/e/2…
For 🇺🇸, see @projectn95
end/
High-risk workers should be wearing fit-tested respirators.
Here's a great resource for #bettermasks in 🇨🇦:
docs.google.com/document/d/e/2…
For 🇺🇸, see @projectn95
end/
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