This picture is creating misplaced outrage bc Biden is in a surgical mask instead of an N95.
1. Yes, N95s or KF94s are better if you need to wear a mask
—AND—
2. Everyone is fully vaxxed and boosted, so masks provide limited benefit (especially considering 5 and 6)
🧵
1. Yes, N95s or KF94s are better if you need to wear a mask
—AND—
2. Everyone is fully vaxxed and boosted, so masks provide limited benefit (especially considering 5 and 6)
🧵
3. Even though surgical mask has lower efficiency, the combined efficiency of two 70% masks is 91%. Saying they’re useless is incorrect.
4. In addition, surgical masks get dinged bc ‘leaky’ out the sides, but this misses point that they still help lower the concentration in the cone of emissions directly in front and slow the speed of the emission jet. (particularly relevant when you factor in 5 and 6 next…)
5. This is a high-ceiling room so it has a large dilution volume.
6. The room also has good ventilation and filtration (I worked with Architect of the Capitol and others in gov’t early on in pandemic on this…)
bc or 5 and 6, emissions from the side of mask dilute quickly.
6. The room also has good ventilation and filtration (I worked with Architect of the Capitol and others in gov’t early on in pandemic on this…)
bc or 5 and 6, emissions from the side of mask dilute quickly.
All in all, a very low risk environment, surgical mask or not. (If your argument is Biden should be wearing an N95 for ‘signaling’ reasons, just say that, but don’t pretend it’s about risk reduction in this scenario.)
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