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Linsey Marr Profile picture
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3 Jan, 4 tweets, 3 min read
Some thoughts for the new year:

How do we do public health better in a country with such a strong culture of individualism? /1
The reluctance to promote rapid tests and N95s is due in part to rules for diagnostics and worker protection (@michael_mina). If the boat is sinking, I'll take any life vest I can get. /2
How do we start adapting our buildings for clean air like we did for clean water? It's time for an Indoor Clean Air Act. @kprather88 See science.org/doi/10.1126/sc… /3
Should have also tagged @CorsIAQ @ShellyMBoulder @WBahnfleth @IAQinGWN @gcmorr @stephensbrent @etgall @Poppendieck and other long-time indoor air researchers whom I'm sure I've overlooked. /4

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More from @linseymarr

Linsey Marr Profile picture
21 Dec 21
Our paper (@isjinpan @ajprussin Duggal lab) on SARS-CoV-2 on surfaces and HVAC filters in dorm rooms housing infected students is now published pubs.acs.org/doi/full/10.10… /1
Free preprint
drive.google.com/file/d/1LB0sb-… /2
We found RNA on 71% of HVAC filters, 57% of surface samples (faucet handle, doorknob, floor, etc.), 67% of bathroom vent grilles at 10 to 10,000 gc/swabbed area of ~10x10 cm2. /3
Read 5 tweets
Linsey Marr Profile picture
18 Nov 21
@theNASEM webinar on Public Health Lessons for Non-Vaccine Influenza Interventions: Looking Past COVID-19 today at 1 pm nam.edu/event/advancin… Report released yesterday at bit.ly/3kHhZeW /1
The report recommends use of respirators, surgical/procedural masks, and multi-layer woven cloth face masks to reduce transmission of SARS-CoV-2, and states that face shields alone are not effective /2
It highlights the importance of physical distancing, ventilation, & air filtration to remove pathogens from the air, but recognizes that physical barriers are not effective & may actually be harmful /3
Read 4 tweets
Linsey Marr Profile picture
22 Oct 21
Tang & I wrote about updating transmission routes to inhalation, spray, and touch, following up on suggestions by Yuguo Li and @Don_Milton. academic.oup.com/cid/advance-ar… /1
"Current infection-control guidelines subscribe to a contact/droplet/airborne paradigm that is based on outdated understanding. Here, we propose to modify and align existing guidelines with a more accurate description of the different transmission routes." /2
"This will improve the effectiveness of control measures as more transmissible variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerge." /3
Read 20 tweets
Linsey Marr Profile picture
21 Oct 21
Great editorial about "The COVID-19 crisis is almost certainly an indoor air crisis; it is very likely a ventilation crisis." (among other crises) onlinelibrary.wiley.com/doi/full/10.11… by Nazaroff @WBahnfleth @WargockiPawel Zhang /1
"The phenomenon of low risk outdoors and high risk indoors deserves some explanation. This is probably the most important observation in this pandemic. There is a simple explanation: dilution." /2
"For an ideal expired jet from a person breathing at rest, at a distance >1 m, there is >10-fold dilution from surrounding air because of...entrainment. If the surrounding air is totally free from infectious virus, as it is outdoors, the concentration beyond 1 m is very low." /3
Read 8 tweets
Linsey Marr Profile picture
21 Oct 21
Just as I advocated for mask use when needed, I'm going to join @j_g_allen in advocating for ending mask rules when no longer needed. In my mind, that's after kids 5-11 have a chance to get vaccinated. /1
My 10-yo will get vaccinated as soon as possible, not because I'm particularly worried about her getting Covid-19 but because I'm worried about her *spreading* it. /2
With the normalization of mask wearing in the US, I hope that people will feel comfortable wearing them or not wearing them as it makes sense (not for political reasons). /3
Read 5 tweets
Linsey Marr Profile picture
19 Oct 21
I wrote about applying what we've learned from Covid-19 to the flu. nytimes.com/2021/10/19/opi… Cleaner air (ventilation & filtration) is a "powerful tool for reducing the risk of Covid-19 transmission, & it should be embraced more thoroughly during this pandemic and to reduce flu"/1
We inadvertently squashed the flu last year, probably thanks to our interventions against Covid-19 combined with our pre-existing immunity to flu. @Lakdawala_Lab showed that this factor is a barrier to airborne transmission. journals.plos.org/plospathogens/… /2
@Lakdawala_Lab "I hope that Covid-19 has catalyzed a shift in thinking about the air we breathe. You wouldn’t drink a glass of water full of pathogens, chemicals and dirt. Why should we put up with breathing contaminated air?" /3
Read 7 tweets

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