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Lazarus Long Profile picture
@LazarusLong13
Dec 20, 2024 • 13 tweets • 5 min read • Read on X
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Not sure what is going on with @HealthcareGlob1 - they sure seem to have it out for @NukitToBeSure.

They blocked me after I pointed out that they were incorrect. I could care less about being blocked.

I do care they did not address the issues I raised. 🧵
They retweeted this tweet from DisabledDoctor, which has numerous issues.

1. FARUVC has been safely
& extensively tested on the eyes. There are a rather large number of studies on the topic.

2. FARUVC will not cause AQ issues, besides a Yup. Not even considering the fact that she recommends using her far-UV devices in ways that are possibly unsafe (pointed at face as they are untested on eyes and in poorly ventilated indoor spaces where it is likely it will cause air quality issues leading to or exacerbating respiratory problems). She's harming vulnerable people while profiting off of them and she seems to give no fucks while somehow managing to get people to aggressively support her when she is (fairly) criticized. She's a master manipulator 8:08 AM 11 Sep 29, 2024 7,975 Views
negligible amount of ozone.

But that's not me saying that, but the studies. Two studies in well sealed rooms - about 5 parts per billion, 5 ppb.

If you are in a well sealed room, you would want that window cracked, anyway, right?

If not, and you are In summary, the two published measurements of far-UVC associated ozone in real-world settings, both around 5 ppb, are likely to be upper limits in terms of real-life far-UVC usage; this is both because of the far-UVC doses used in the studies, but also because both rooms were comparatively well sealed (respectively 0.4 and 1.4 ACH, see Table 1), whereas far-UVC will predominantly be used in public indoor spaces, which typically feature higher air-exchange rates.18 Overall it is reasonable to assume that far-UVC-associated ozone levels in real-life settings are extremely unlikely to exceed 1...
gobbling a quick bite in an airport, not a problem, anyway, (I will only be doing a sipmask and shakes, myself) - the ozone will dissipate.

Guess what gobbles ozone? VOC carbon filters. Hit my account plus MEGA VOC to find the build.

But 5 ppb? I am not worried about it.
But, IS 5 ppb a risk?

No risk as low as 10 ppb per this study...and we are 5 ppb below that, with ways to mitigate even that. In summary, based on multiple very large epidemiological studies focusing on the relationship between outdoor ozone concentration and long-term human health, there is no significant evidence for increased ozone risks at ozone concentrations as low as 10 ppb, and there is persuasive evidence for a threshold in risk at ozone exposures below about 35–50 ppb; this pattern does not change whether or not other associated pollutants are included in the risk estimate. Although far-UVC lamps are not classified as medical devices, the epidemiological results are consistent with current FDA guidelines...
VOCs and ozone? You are right to be concerned - and now not be concerned 👇.

But...cleaning with limonene based cleaners (Citrus King , citrus smelling cleaners probably) ?

Turning off the FARUVC would be a reasonable thing to do.

onlinelibrary.wiley.com/doi/full/10.11…Indoors, at the low induced ozone concentrations of relevance here, ozone does not react rapidly enough with preexisting airborne VOCs to compete with even extremely low levels (e.g., 0.1 ACH) of room ventilation, so significant ultrafine particle production via far-UVC-induced ozone is unlikely. Experimental measurements in a real-life hotel room support this conclusion. One specific exception is the cleaning material limonene, which has an unusually high interaction cross-section with ozone; in the far-UVC context, turning off far-UVC lights during cleaning with limonene products would be...
Is Nukit just trying to just make a buck, taking advantage of the vulnerable?

No - lol. They are a huge influencer.

The vulnerable? They are the reason Nukit started w/UVC, to provide Covid free air to the poor jammed into tiny apartments with no room for CR boxes. Indoors, at the low induced ozone concentrations of relevance here, ozone does not react rapidly enough with preexisting airborne VOCs to compete with even extremely low levels (e.g., 0.1 ACH) of room ventilation, so significant ultrafine particle production via far-UVC-induced ozone is unlikely. Experimental measurements in a real-life hotel room support this conclusion. One specific exception is the cleaning material limonene, which has an unusually high interaction cross-section with ozone; in the far-UVC context, turning off far-UVC lights during cleaning with limonene products would be...
Finally, there has been a fair amount of discussion of the picture on the Cybermarket website.

Does it depict closer than 50 cm, which is the safe distance as amply discussed by Nukit?

cybernightmarket.com/products/mini-…Cybermarket 75 cm from faces.
Suggested use: Assuming no more than four hours of use in a single day, and an approximate room size of 9-12m², each lamp should be positioned no closer than 50cm away from a room occupant. The more widely the lamps are spread, the more air volume will be exposed. If there are children or pets present, the lamps should be placed well out of reach. For more information, see: How to use your Nukit Torch Far-UVC Lights
No. It is 75 cm. I DM'd that party.

I am in blue, they are in gray. Unless you are IN your dinner plate with your head, these are about an arm length away from your eyes 10:17 PM 3 feet then? At least 91 cm ? I have some long arms....but I went to be accurate. 10:18 PM Between 2 and 3 feet, so roughly 75cm 10:18 PM Ok, thank you.
Here is more by Nukit.

"... 200nm to 230nm is often described as “eye and skin safe” but is perhaps more accurately described as “safer”. There is still an exposure limit- just much, much higher than with other portions of the UV spectrum." Description: The germicidal properties of ultraviolet light are well established and have been in use for almost 100 years, but that effectiveness has always come at a price- the potential for eye and skin damage. Far-UVC, the portion of the ultraviolet spectrum that ranges from 200nm to 230nm is often described as “eye and skin safe” but is perhaps more accurately described as “safer”. There is still an exposure limit- just much, much higher than with other portions of the UV spectrum.
What are my biases?

I have disagreed with Nukit in the past on a couple of non-technical issues, but these are times fraught with tension.

On the technical issues, I have found them
incredibly knowledgeable, and I very much appreciate their engineering.

Anyone accusing Nukit of endangering others are simply not knowledgeable on the topic.

Do I have a Cybermarket light? No. Do I anticipate getting one? Maybe in the future, if they are still available.
I have other projects I am currently interested in.

Am I an expert in FARUVC? No, but I can sure read a study.

And so can you.

Where can you buy the lights?

Right here:

cybernightmarket.com/products/mini-…

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More from @LazarusLong13

Lazarus Long Profile picture
Jun 8
"COVID IS OVER, YOU DON'T NEED THAT!"

Reason 4,657 on why I mask now that I understand aerosols and transmission. It's not all about COVID.

This is Chicago, but it's really Anytown, USA. Image
"The human DNA virome. Prevalences (%) of viral DNAs in the body (≥1 tissue positive for a virus) and in different organs as determined by qPCR or NGS"

researchgate.net/figure/The-hum…

x.com/AbundantLandUs… Image
.Why I mask in more details...

EV-D68. An enterovirus - many people think enteroviruses are strictly fecal-oral.

They think wrong ( this is not a subtweet at Dr. Johnson).

Read 6 tweets
Lazarus Long Profile picture
Jun 7
How do we know TB is airborne?

71 guinea pigs gave their lives between 1956 and 1958 in the eponymous study by Riley et al, getting TB air piped in from some TB patients, to prove TB is airborne.

Influenza is kind of airborne per most doctors. But kind of not.

So....

/1 Image
We need some volunteers.

Will horses be those volunteers that finally lay it all out?

Yes - but none of them lost their lives.

Air samplers were deployed and tracked horses inoculated with Equine influenza virus (EIV).

From the very first day post inoculation (dpi), until the Image
12th day, EIV was found in the air, in this new study.

With no horses, or guinea pigs, hurt in the process.



But sure, influenza's not airborne - if you are the USDA, right, @nirav_maine?

Of course, yet another new study points an accusatorysciencedirect.com/science/articl…
Read 9 tweets
Lazarus Long Profile picture
May 26
Thank you @BarryHunt008 for flagging this.

@ThailandMedicaX, retweeted by some because of their controversial takes (ahem, their lies?), is saying that FAR-UVC is dangerous because somehow the light will get into the lungs.

Lol.

They are just apparent supplement grifters.

🧵 Image
I noticed they were using @NukitToBeSure's excellent torches as their example picture.

Strange to be so selective of an example picture for someone purporting to be an independent news source on health.

Hmm. I helped defend Nukit against charges of Image
racism by a very nasty couple who it turned out just do not like UVC, personally. I wonder....

Yep, ThailandMedicalX has blocked me.

But, it's weird for a purported news source to block someone like me @gorskon
@doritmi @19joho.

And them blocking me, is probably because Image
Image
Read 21 tweets
Lazarus Long Profile picture
May 25
You've heard of "The Three Problem." - great book, and excellent Netflix series.

If you want to be avoid catching Covid, you probably have "The Empty Room" situation in the back of your mind.

How long after a room had people in it, can you safely demask?

Thread.
/1 3 body problem netflix cover showing a eye with a countdown running in it. That was a countdown to each person's death.
Measles was thought to be airborne after a child caught measles an hour after the infected child left the same office.

.

Interestingly, you can see the reluctance in blue below to call measles airborne. Much like the WHO with @mvankerkhove researchgate.net/publication/19…In February 1981, a measles outbreak occurred in a pediatric practice in DeKalb County, GA. The source case, a 12-year-old boy vaccinated against measles at 11 1/2 months of age, was in the office for one hour on the second day of rash, primarily in a single examining room. On examination, he was noted to be coughing vigorously. Seven secondary cases of measles occurred due to exposure in the office. Four children had transient contact with the source patient as he entered or exited through the waiting room; only one of the four had face-to-face contact within 1 m of the source patient. The...
which spent millions to rebrand SARS2 as "through the air" rather than airborne.

It is an inconvenient truth that then leads us to the study showing an #EmptyRoom SARS2 infection at 1 hour and 43 minutes, and FOUR HOURS and FORTY-FIVE MINUTES.

In this study, it comes with Experimental evidence suggests that SARS-CoV-2 remains viable within aerosols with a half-life of approximately 1-3 hours, though changes in aerosol microenvironment may shorten viability to minutes. However, it remains unclear how long airborne SARS-CoV-2 can transmit infection. Whole genome sequencing of nasopharyngeal samples obtained from patients on an outbreak unit suggested in-room transmission of the delta variant, AY3 lineage, of SARS-CoV-2 to two patients admitted 1 hour, 43 minutes and 4 hours, 45 minutes after discharge of an asymptomatic infected patient. These findings suggest...
Diagram showing 1 hour and 43 minute and 4 hour and 45 minute infections.
Read 30 tweets
Lazarus Long Profile picture
May 23
Mum's the word - if @SecKennedy is Mum.

You see, I have been a VERY FOCAL CDC critic. But you can't criticize without listening.

And I have been noticing that that the CDC has been very, very quiet.

NPR noticed as well. Image
This is crazy. Image
Yes, the @CDCgov has been deathly quiet.

90 times last year, versus 4 this year.

This is not MAHA.

This is MASA - Make America Silent Again.

And as one of the CDC's most focal critics? We NEED them to be sharing Public Health information. Image
Read 5 tweets
Lazarus Long Profile picture
May 1
Fit factor of 250- 4000 versus the normal 100-200 for an N95? Where do I sign up?

Oops, that's here. With me. Starting a build with an Ebay'd Bullard EVA PAPR's filter - and some DIY loving goodness of a heat gun and PVC pipes.

The benefit of this build will be the over 10
hour run-time of the massive battery on the PAPR.
Got a long dental appointment? This will be the answer.

Let's get cracking!
Read 32 tweets

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