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Lazarus Long Profile picture
@LazarusLong13
Jan 5, 2022 • 10 tweets • 5 min read • Read on X
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A quick thread on why elastomeric respirators are better than N95's.

In short? Like N95/N99 disposables are better than surgical/cloth masks?

Primarily, fit. Not that fit 👇👇.

How it fits to your face.

For a number of different reasons that may surprise you.
First off, getting the respirator to actually fit to your face.

Not all facial geometries are the same.

The Fit Test Panels used to evaluate fit, I submit, do not have enough women or Asians.

Archived the pdf here:
web.archive.org/web/2022010510…

Study here:
tandfonline.com/doi/abs/10.108…
So, no surprise that with N95 disposables that 👇👇

High - level:
web.archive.org/web/2021082422…

Direct Study Link:
web.archive.org/web/2021020313…
web.archive.org/web/2021082422… Image
Do elastomerics fit easier? Yes - because of the elastomeric material (another way of saying 'rubber-like', but usually made of medical grade silicone.

So when comparing the two, we find a huge difference:

With 60 subjects from the ASA, 98% of elastomerics passed fit testing Image
versus 57% of disposables.

And the single failed fit test for the elasto's? She switched from a medium to a small and passed.

web.archive.org/web/2021020313… Image
In this next study:
jamanetwork.com/journals/jama/…

87% of participants had experience with elastomerics or disposables.

Only 1.3% had experience with elastos.

So, they were largely experienced at wearing N95's.
Yet, after watching just a 9 minute video, 92% were able to successfully fit the elastos's vs 88.5% in the N95's that they were experienced at.

Let's move on.

Speaking of movement, elastomerics keep their fit much better during movement.

Do you move during your job? Cook?
Clean? Do things as manually involved as CPR?

Then you will want an elasto.

In jamanetwork.com/journals/jaman…

N95's performance during CPR was poor. (Filtering Face piece Respirator 👇).

But elastomeric half-mask respirators' (EHMRs) performance was high.

This study confirmed Image
this next study, that CPR causes N95's to lose fit.

Their conclusion is stark and very real.

sciencedirect.com/science/articl… Image
Let's end on a light note.

Elastomeric respirators?

They let you keep fit and having fun!

With clean lungs!

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More from @LazarusLong13

Lazarus Long Profile picture
Feb 23
Great interview of Ed Yong - I am just covering the C0V1D part.

/1 The Interview Ed Yong Wants to Show You the Hidden Reality of the World Ed standing with his arms folded. His eyes tell you COVID is not over.
You've been clear in saying that C0V1D has not gone away. You ask people to wear masks at your events..... You’ve been clear in saying that Covid has not gone away. You ask people to wear masks at your events. But that attitude is not necessarily where the rest of the world is. How do you think about continuing to take precautions and advising others to do so when it feels as if society has moved on? I do it for a bunch of reasons. Firstly, I have learned that I enjoy not being sick. I know that the cost of long Covid is real and substantial, and I don’t want to run that risk lightly.
"I think it makes a huge difference to them to have the person at the front of the stage wear a mask. It tells them, It’s not weird." . I also know that I have many friends and people I’m close to who are immunocompromised. So for the sake of the people around me, I also don’t want to get sick. When I do events, I wear a mask for those reasons, and because I know that every time I do a talk, while the vast majority of people in the audience have probably moved on, there are going to be other people who haven’t. I think it makes a huge difference to them to have the person at the front of the stage wear a mask. It tells them, It’s not weird. So I do it for that reason, too. In terms of holding this line at a point when a l...
Read 5 tweets
Lazarus Long Profile picture
Feb 22
I am sorry if this will upset you. A lot of people depend on NASAL SPRAYS for C0V1D.

I have been iffy on them, but viewed them as "if they don't hurt, why not" but not for me.

There's an analysis
on Reddit that you should read in detail, and make up your own mind.
/1
Here is the link:


Here is a 4 tweet TLDR version.

Here is how it starts - the author goes HARD at the underlying studies. reddit.com/r/ZeroCovidCom…There is no convincing evidence that nasal sprays prevent COVID-19 There is a lot of misinformation out there about nasal sprays preventing COVID-19. Unfortunately, there are no convincing studies showing that nasal sprays prevent COVID-19. The published studies investigating whether or not nasal sprays prevent COVID-19 each have major issues, which I will detail here. I have a PhD in biochemistry and one of my PhD projects was on COVID-19. The main takeaway of this post is that there is no sound evidence that nasal sprays prevent COVID-19. Thus, nasal sprays should not be used for COVID-...
Some pretty harsh language, but to me the important thing is we still have clean air.

Which is good, because it boils down to only 2 studies saying that nasal sprays work, per them. 5. Summary/TLDR and final thoughts Unfortunately, many people including covid influencers have fallen for the grift of nasal sprays preventing COVID-19. Some such influencers have promoted these nasal sprays for free and helped spread the misinformation that they prevent COVID-19. Unlike with nasal sprays, there is ample, sound evidence that high-quality well-fitting respirators, ventilation and air purification prevent COVID-19. The human clinical trials testing whether or not nasal sprays prevent COVID-19 are garbage, and to my knowledge there are only two! Please don't lower your covid...
Read 7 tweets
Lazarus Long Profile picture
Feb 17
Guillain-Barre Syndrome linked to poultry eggs? H5N1?!

The BBC had a good article from February 3 that talks about how these Indian states' cases are linked to campylobacter jejuni, a bacteria. It IS the most common root-cause, globally.

And IT is commonly found in poultry. AVOID CHICKEN AND EGGS RIGHT NOW SIGN showing for the country of India in a tweet from @alwaysmadesh. Due to Guillain-Barre Syndrome.
"Campylobacter jejuni infection is the common associated microorganism (25–40%), followed by cytomegalovirus (6–15%), Mycoplasma pneumoniae (3–21%), and Haemophilus influenzae (1–9%)"

BTW - Cytomegalovirus is also an airborne virus - that just happens to cause brain cancer.
Mycoplasma pneumoniae - also airborne.

And...drum roll please...Campylobacter jejuni also airborne.

Don't get me wrong - jejuni most definitely is also fecal-oral, no question.

But it's also airborne.

Sampled from the air below. Figure 7. GCN/m3 results using microorganism-specific primers. These microorganisms were chosen for their pathogenic and opportunistic nature. Samples 1–12 indicate the WWC collections in House A, 1R–12R the WWC collections in House B and 1F–12F the filter collections in House A.
Read 11 tweets
Lazarus Long Profile picture
Feb 13
Just a little bit closer to acknowledging H5N1 is airborne.

3 vets asymptomatic, + for bird flu antibodies. Did not wear respiratory gear or glasses.

Did wear gloves and coveralls - so rules out fomites.

One practicing in states with NO H5N1.

Vets get very close to /1 No seropositive practitioner knew that they were working with dairy cattle with known or suspected HPAI A(H5) infection. None of the seropositive practitioners reported wearing respiratory or eye protection while providing veterinary care to cattle. Neither respiratory or eye protection is recommended when working with uninfected animals in regions without confirmed cases; however, safety goggles and a respirator are recommended when working with uninfected animals in regions where there are confirmed or potentially infected animals (4).
Among 150 bovine veterinary practitioners, three had evidence of recent infection with HPAI A(H5) virus, including one who only practiced in two states (Georgia and South Carolina) with no known HPAI A(H5) virus infection in cattle and no reported human cases (1,2); this practitioner reported no exposures to animals with known or suspected HPAI A(H5) virus infections. These findings suggest that there might be HPAI A(H5) virus–infected dairy cattle in states where infection in dairy cattle has not yet been identified, highlighting the importance of rapid identification of infected dairy cat...
aerosol sources. Aerosol orifices.

This lines up with previous studies.

"93% glove usage and 85% boot covers would have stopped transmission" 93% glove usage and 85% boot covers would have stopped transmission CDC PPE Study of Dairy Workers Infected. 11/7/2024 Dairy workers exposed to ill cows during the week after A(H5N1) virus detection reported higher use of gloves (93%), boots or boot covers (83%), head or hair covers (79%), and eye protection (76%) compared with those who reported exposure to ill cows in the week before detection of HPAI A(H5N1). Reported use of N95 FFRs or other respirators and other types of masks was low (9% and 27%, respectively) among workers exposed to ill cows the week before A(H5N1) outbreaks were d...
CDC PPE Study of Dairy Workers Infected. 11/7/2024 Dairy workers exposed to ill cows during the week after A(H5N1) virus detection reported higher use of gloves (93%), boots or boot covers (83%), head or hair covers (79%), and eye protection (76%) compared with those who reported exposure to ill cows in the week before detection of HPAI A(H5N1). Reported use of N95 FFRs or other respirators and other types of masks was low (9% and 27%, respectively) among workers exposed to ill cows the week before A(H5N1) outbreaks were detected, with higher usage reported among exposed workers in the week...
Veterinarians are one possible vector between infected and uninfected herds/ farms.
Read 4 tweets
Lazarus Long Profile picture
Feb 13
Latest Pew Poll.

Or an exercise on "How well did Biden disappear C0V1D?"

On one hand, 21% of Americans still view C0V1D as a major public threat 21% of Americans still view COVID as a major public threat.
On the other hand, still masking?

6% of Democrats
4% Americans
2% Republicans

Guess when Biden took over on the graph? On the other hand, still masking? 6% of Democrats 4% Americans 2% Republicans Guess when Biden took over on the graph?
Yes - pretty much as soon as Biden took over, he began disappearing C0V1D.

BTW, the last poll was by yougov - masking was at 12% last year. On the other hand, still masking? 6% of Democrats 4% Americans 2% Republicans Guess when Biden took over on the graph?
Read 12 tweets
Lazarus Long Profile picture
Feb 11
What do we need to do to make every healthcare worker in the world understand that flu is airborne?

Get IPC on board.

Let me introduce you to Dr. Zahir Hirji, President of @IPACCanada at #IPAC2023.

Where do we know him from?

That's a very interesting question.

/1 Image
In 2006, Dr. Tellier wrote an article in the CDC EID explaining that influenza was airborne via aerosols.

Quite nicely done.

pmc.ncbi.nlm.nih.gov/articles/PMC33…
Dr. Zahir Hirji and some other IPC doctors from the Canadian HUGE University Health Network disagreed.

Right back you, Tellier - in 2007.

wwwnc.cdc.gov/eid/article/13…Camille Lemieux*Comments to Author , Gabrielle Brankston*1, Leah Gitterman*, Zahir Hirji*, and Michael Gardam*† Author affiliations: *University Health Network, Toronto, Ontario, Canada; †University of Toronto, Toronto, Ontario, Canada;
Read 10 tweets

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