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Lazarus Long Profile picture
@LazarusLong13
May 31 • 21 tweets • 12 min read Twitter logo Read on Twitter
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Making the case for the #CorsiRosenthalBox with studies.

A simple thread.
"no U.S. Energy Star certified air cleaners have CADR values (for either tobacco smoke, dust, or pollen) matching the CADR value for the CR Box even on low speed "

On cost? 1/10th.

1019 to 1444 m3/hr CADR.

(600 to 850 ft3/min)

Published here:
tandfonline.com/doi/full/10.10… ImageImage
An incredibly thorough study published in February 2023, with all of its authors from @NIOSH.

With universal masking in a 3-ply cotton mask, exposure to the relevant aerosol size is reduced by 88 to 94%, with the #CorsiRosenthalBox.

73% w/ CRBox alone.

sciencedirect.com/science/articl… ImageImage
Very good thread on this study here:

Essentially the same NIOSH team investigated HEPA efficacy.

65% reduction with HEPA alone.

So, at a much cheaper price, the #CorsiRosenthalBox gets better results.

cdc.gov/mmwr/volumes/7…
But can HEPAs remove SARS-COV-2 from the air? Yes.

(Would #CorsiRosenthalBox do the same? Yes - faster and cheaper.

Has it been studied specifically for this? No. HEPAs barely have.

Do the same laws of physics apply? Yes.)

journals.asm.org/doi/full/10.11… Image
But can HEPAs really remove SARS-COV-2 from the air?

Yes - in a UK hospital, HEPAs were off. Cov1d was in the air. Turned on. No more CoV1d.

1000 m3/hour CADR.

Remember the first study?

1019 to 1444 m3/ hour for the CR box.

cuh.nhs.uk/news/air-filte…

academic.oup.com/cid/article/75… Image
@MarinaC_Dyb and her fellow authors found a massive reduction in aerosols in OCCUPIED classrooms using the #CorsiRosenthalBox. Also found that ALL of the air went in.

No wonder they have rolled them out to 400 locations.

Study is linked here:
indoorairquality.initiative.uconn.edu/testing-the-ef… Image
Oh for Pete's sake. @elonmusk has just killed another thread.

Let me add these manually.
"Also found that ALL of the air went in" - quoting above to go into a little more detail:

This answers, in a study, the concern that it just moves the air around. That it won't go into the filter.

It does, and this had to be pointed out.
The CDC, of which NIOSH is part of, has officially recommended 5 ACH, minimum, and that DIY Air Cleaners are effective at reducing the risk of transmission of Cov1d.

The #CorsiRosenthalBox is
specifically mentioned as part of that solution.

cdc.gov/coronavirus/20… ImageImageImage
@3M has studied it in their formal lab - and is officially on board:

news.3m.com/2022-02-24-3M-…
The famous UL, Inc testing the safety of the #CorsiRosenthalBox, to make sure it won't catch on fire.

It won't - even if the filters are loaded up.

(The link that is out on Twitter appears to be dead.)

ul.org/library/2988
"Does Using Corsi–Rosenthal Boxes to Mitigate COVID-19 Transmission Also Reduce Indoor Air Concentrations of PFAS and Phthalates?"

Yes.

pubs.acs.org/doi/10.1021/ac… Image
Some have expressed surprise that this was found.

Dr. Corsi explains:

And the rest of your family?

30 case studies- oops, 30 of your stories here, where your family used the #CorsiRi
A thesis - a study, that found 7 PFAs, and exposure to for both dog and human. (@ShellyMBoulder collaborated).
elischolar.library.yale.edu/ysphtdl/2161/ Image
How do we know that dogs are affected? Because it is dogs that get experimented on.

And not to get too personal, but my dog has stage 4 chronic kidney disease. CKD can be caused by PFAs.

Did I do that? Or at least not prevent it? A lot of

wunc.org/health/2021-05… Image
years with no air filtration.

But hey - she is 15 years old, and it could be just old age.

In any event, I don't want to go into any more detail, but now I know better.

But besides PFAs, dogs can catch Cov1d.

As can cats.

In fact, from the study, we should see our cat as part of our family regarding virus transmission.

Can a cat or dog wear a mask?

Yes, with training.

But what if you could reduce their risk of catching Cov1d without all that? Image
And the risk to the rest of your family?

30 case studies- oops, 30 of your stories here, where your family used the #CorsiRosenthalBox as the centerpiece of your family pandemic prevention protocol.

And it worked.

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More from @LazarusLong13

Lazarus Long Profile picture
Jun 1
THE DIY HOOD HEPA.

One of my favorite concepts that you can DIY at home if someone gets Covid.

Top ventilated HEPA. (Really can just change how it's taped up, so even side exhaust will work. Even a CR box could be used (albeit single or double filter version).)
Duct tape.
PVC. Image
Add that up and you get drastic reduction of Covid floating in the air - AT THE SOURCE.

I spotted this in other studies long ago, but this version is from here:

@SimonAJoosten1's study, linked next tweet. Image
Read 5 tweets
Lazarus Long Profile picture
May 31
@PaulSaxMD - thank you for the excellent write-up on Loeb at al (2022).

I have a separate criticism from an aerosol perspective. Loeb had donning and doffing at 3 feet.

A surgical mask is not actually Respiratory Protective Equipment (NIOSH) due to not being fitted.
/1
So its effectiveness will not be as diminished as much as an N95's.

Donning am N95 after walking into a room where an unmasked patient has been even just breathing? And donning at only 3 feet away?

An asbestos abatement technician would be fired.

Would a BSL3 lab worker
don at only 3 feet away from a infected participant in the lab?

This is what we have to assume happened as this was the method documented in Loeb 2022- and 2009.

Read 4 tweets
Lazarus Long Profile picture
May 31
Influence the CDC and influence the world.

Influence the HICPAC, and influence the CDC.

I'm hoping some high-level names will comment because they are pushing for surgical masks for "seasonal coronaviruses" and the flu.

@brosseau_lisa @HuffmanLabDU
@ShellyMBoulder @linseymarr @kprather88 @Globalbiosec @jljcolorado @HoomanParhizkar
@CappaSnappa @CorsIAQ

Today is the last day to register, direct link for your convenience:
cdc.gov/hicpac/meeting…

They will be using Loeb (2009) and (2022) to justify

their position.

If I may be so bold as to point out? Both studies had donning and doffing at 3 feet.

2022 with Covid, also required a fever or cough.

2022 - Supplemental Section
acpjournals.org/doi/suppl/10.7…

Study Protocol, Section 2.3
acpjournals.org/doi/suppl/10.7… ImageImage
Read 9 tweets
Lazarus Long Profile picture
May 30
I retweeted this, but wanted to add something.

Due to the immuno-evasiveness of SC2, that 600M is just on the first go-around.

These are the thoughts that keep me up at night reading transmission studies, thinking about how to prevent transmission - and tweeting all of it.
And I have to add something.

Kids.

"These data suggest that rapid clearance of SARS-CoV-2 in children may compromise their cellular immunity and ability to resist reinfection."

And we know kids pop at least at 10% for LongCovid, the first time.
/2

Got any kids in school?

If there's a 10% chance of LongCovid for any infection for a child, how many infections until your child is likely to catch LongCovid?

12 times. 👇.

But what if the initial 10% chance turns to 20% on reinfection?

4 times. 👇

And who has that ImageImage
Read 4 tweets
Lazarus Long Profile picture
May 30
A 🧵on near field ( < 6 feet) and far field (>6 feet) aerosols. (To be perfectly frank, this one's for me, but you are invited along the ride into my noggin).

Both airborne, and both important.

Let's start with tweets from aerosol and IAQ scientists.
Do aerosols even matter?

Yes. Millions of infectious aerosols emitted per hour in this Dr. Mowaska (technically Ma et Al) study:

academic.oup.com/cid/article/72… Image
The variants are evolving to be better at transmission.

Here we find Alpha to have 18-fold more fine aerosols shed than previous.

academic.oup.com/cid/article/75… Image
Read 18 tweets
Lazarus Long Profile picture
May 30
Law conference is requiring respirators versus....
@gabbystern @mvankerkhove @DrMikeRyan @JeremyFarrar @DrTedros's @WHO at #WHA76.

Watch the video. Notice anything in comparison to that law conference?

Not one single respirator. Not one on the faces of any #WHA76 attendee.

There will be huge law conference with every single lawyer in respirators, but not at the @WHO.
Read 10 tweets

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