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Lazarus Long Profile picture
@LazarusLong13
Sep 20, 2021 • 12 tweets • 6 min read • Read on X
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Here's a true CoVid story from the Chicoutimi Hospital in Quebec, Canada. From catastrophe to redemption.

Huge outbreak of 400 employees over 2.5 months, directly linked to nosocomial infections. 70 HAI patients.
To be frank, at first the employees were blamed.

Because of overtime due to CoVid - but the employees were blamed.

lequotidien.com/actualites/dur…

Was that the end of the story?
No. The workers did not want to catch CoVid. They were careful.

See the quote below from Anne who caught CoVid below.

And the outbreak continued, until someone decided to test the ventilation.
Right now, you just raised an eyebrow.

"Why test the ventilation? It's not airborne!"

But, as you can see above, Anne was wearing her droplet protection.

So, here were the ventilation results as measured in CO2 (a decent aerosol stand-in).

Up to 1611 ppm. In a hospital!
So, what did they do?

Spent $200,000 to improve the ventilation (bring in exterior air) and bring in negative pressure rooms.
The ventilation improved, as expected. But it wasn't quite enough.

Why? Ventilation/ filtration solve far-field aerosols, but cannot act quick enough to remediate aerosols that are up close (near-field aerosols).

Those can only be remediated by airborne PPE.
In February, N95's were mandated.

ici.radio-canada.ca/premiere/emiss…
N95's are great - but they can be expensive if replacing them all the time, right?

N100 Elastomeric respirators, though - a little more expensive up front - but within a few days much, much cheaper.

Have these been deployed anywhere? Yes- at the Alleghany Health Network.
13 hospitals, 250 locations, 21,000+ employees.

Here is Dr. Chalikondra, CMO of AHN (ahn.org/about/leadersh…), talking about that roll-out:


Or here is a study that was done on that roll-out:
journalacs.org/article/S1072-…
Here's a cost-save calculator from MSA for elastomeric respirators over N95's:
webapps.msasafety.com/apr-calculator/

But besides the cost-save that will make you the hero of your administration?

You will be the hero to the HCW's under your charge. Why?
After the AHN roll-out, guess how many wanted to go back to N95's? 0.

facs.org/media/press-re…

N100's medical grade silicone is much more comfortable than scratchy N95 material.

And safer since they protect against 99.97% of particles vs. 95%.

cdc.gov/niosh/npptl/to…
What about the patients? Like anything new - it's just a matter of education.



My DM's are open for any questions that you might have - not just HCW's! Regular people wear N100 elastomeric respirators, too:

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More from @LazarusLong13

Lazarus Long Profile picture
Mar 3
A doctor complaining about wearing N95s? Thread foreshadow in the gif 👇.

Dr. Sax, you should read this.

The arrogance of medical doctors thinking they know better than the CDC NIOSH and OSHA?

This comes as no surprise.
Imagine if an asbestos worker, or a tech working in BioSafety Lab was complaining about this.

But somehow, doctors making over $200,000 get carte blanche and and a piece in the @NEJM Voices.

And he does have a loud voice.
This is Dr. Sax, Clinical Director, Division of Infectious Diseases (ID), at THE Harvard hospital. In 2014, he wrote about how ID docs only make $174,000.

He probably makes northwards of $269,000.

This is very, very relevant.

You see, he is put out by the inconvenience Image
Read 23 tweets
Lazarus Long Profile picture
Feb 27
From the ZeroCovid sub on Reddit.

How DO we do it?

Hyper vigilance, constant exposure calculations, discussing and taking precautions?

How do I do it?

Quick thread. I would like to hear covid conscious folks opinions on this: I have long covid (mecfs + pots + mcas). I’ve been sick to varying degrees since 2022. My life has been severely affected by this. At this point, I can’t work. I am mostly housebound, recovering slowly but I still have to spend some days in bed. Recovery from this is awful, especially because it’s not widely understood. With all that said. I still feel like, for me, a life full of hyper vigilance, constant exposure calculations, discussing and taking precautions…I can’t do it. I don’t want to live that way. How can I approach t...
I don't do it.

I don't do exposure calculations.

I don't have hyper vigilance.

I am Vax, Mask, and Relax.

For me, it's just a series of habits now. Drive to the wherever, hit parking lot, put on N95. Get out of car. Stays on until I get back into the car.
A new vaccine comes out? I get it.

I go stay in a hotel?

2nd floor Motel 6 with no shared HVAC (has the PTAC) . Open door/windows for one hour until complete air exchange.

Go through a drive through? N95 on before window is rolled down. Drive away? I roll down both to
Read 6 tweets
Lazarus Long Profile picture
Feb 26
After reading a study, and reaching for my phone, if the first thing I do is check to see if I have @'d someone in the past?

That's not a good sign.

I have never @'d them, and this is not directed @ them.

But this IS a debunk thread.

And it starts with who.

/1
Study here. Before you read it?

This thread is about providing context. Read the thread, @SalvMattera's comments, AND THEN, read the study.

0/10 from me.

thelancet.com/journals/lanep…
Who paid for it? The Dutch government - who has been spectacularly almost Tegnell-like in their downplaying of LongCovid and masks.

Lead authors are from RIVM, their CDC.

RIVM was antimask even when they FINALLY recommended masks in OCTOBER 2020.

nltimes.nl/2020/10/03/dut…Image
Image
Read 13 tweets
Lazarus Long Profile picture
Dec 21, 2025
Oh, we are cooked. Just cooked.

"Brain Mitochondrial dysfunction, known for ~20 years is finally recognized as a central upstream driver of Alzheimer’s disease (AD), not just a downstream effect."

And SARS2's targeting of mitochondria is well-known.

Even in the brain.
/1 We identified dysregulation of mitochondrial and synaptic pathways in deep-layer excitatory neurons and upregulation of neuroinflammation in glia, consistent across both mRNA and protein. Remarkably, these alterations overlapped substantially with changes in age-related neurodegenerative diseases, including Parkinson’s disease and Alzheimer’s disease. Our work, combining multiple experimental and analytical methods, demonstrates the brain-wide impact of severe acute/subacute COVID-19, involving both cortical and subcortical regions, shedding light on potential therapeutic targets within pat...
@LauraMiers, in case you don't have it.

nature.com/articles/s4358…
@LauraMiers This is yet another reason why I N95.

Read 6 tweets
Lazarus Long Profile picture
Dec 17, 2025
@neiljshaw - — a few tips on your excellent article from a clean air advocate

"Consider Wearing a Mask" ?

No, "It is incredibly important to wear a well-fitting mask such as a N95, KN95, or KF94, for the best protection."

You two are doing Image
public health with this article.

Public health is best done with simple clear instructions.

No:
"These masks act as a barrier, reducing the spread of respiratory droplets when people talk, sneeze or cough."

Yes:
"These masks act as a HEPA air cleaner for the face,
cleaning the air of respiratory aerosols when people breathe, talk, sneeze or cough."

The barrier carries the idea of an immovable wall. Unable to be penetrated by things like oxygen and CO2 - which feeds antimaskers.

As an who debunks antimaskers, it is
Read 9 tweets
Lazarus Long Profile picture
Dec 11, 2025
As an anonymous clean air advocate, I've put a bit of thought into how to present, well, my expertise.

If someone were to say, "How do I know you know what you are talking about? Are you a doctor, or a virologist?"

To which, I would say...."No, but that's a good thing.
/1
I have focused on aerosol and masking science. Because it is those fields that give us the most information on how airborne particles, aerosols, get from Person A to Person B.

My expertise is derived from the great studies of Dr. Lindsay Marr, MacArthur recipient. Dr. Prather,
double National Academy member, Dr Milton, inventor of the Gesundheit, aerosol scientist and medical doctor; Dr Coleman whose group found that duckbill N95s captured 98% of emitted respiratory aerosols, and more excellent individual aerosol scientists.
Read 17 tweets

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