1/ Source Reduction.
Ventilation & filtration are important, but so is source reduction.
"If there is a pile of manure in a space, do not try to remove the odor by ventilation. Remove the pile of manure." (Max von Pettenkofer, 1858)
Ventilation & filtration are important, but so is source reduction.
"If there is a pile of manure in a space, do not try to remove the odor by ventilation. Remove the pile of manure." (Max von Pettenkofer, 1858)
2/ Humans who are infected are not manure, but we should do everything possible to reduce the emissions of infectors indoors (in addition to grater ventilation and improved filtration). So, how do we do that?
3/ First, anyone who has had contact w/ an infector should quarantine and not go to work, school, and other indoor environments other than their homes. They need to be removed from the playing field. Testing is also valuable for keeping positive cases in isolation & off field.
4/ Second, EVERYONE should be required to wear masks in buildings, as infectors at work, school, etc. are largely not identifiable. Even if the infector's mask reduces aerosol particle volume by 40% & receptor's masks are 40% efficient, that's a 64% dose reduction.
5/ De-densify building occupants to the extent possible w/ staggered work schedules, those being remote who can work or learn remotely. If total occupants are reduced by 50%, there is a 50% reduction in the probability (or total number) of infectors in the space.
6/ None of this is rocket science. But we need to focus on source reduction as an integral part of layered dose (and therefore risk) reduction. Listen to Max von Pettenkofer. Different time, but he understood over 160 years ago the importance of source reduction.
That is "greater" ventilation. "Grater ventilation" sounds painful!
• • •
Missing some Tweet in this thread? You can try to
force a refresh
