Nafnlaus Profile picture
Jan 20 13 tweets 3 min read
Watching my @Lufthansa flight leave. Denied boarding because I *asked* about my *#Lufthansa mask-policy-compliant* valveless GVS 644, before - changing into a non-elastomeric at their request. But the angry-before-I-even-opened-my-mouth gate agent convinced the pilot to ban me.
There was a woman who saw what was happening who nearly refused to fly if I wasn't let on. They walled her off from me and marched her down the boarding ramp.
Full story: I arrive with a variety of masking options, in order from most preferred to least: 1) 3M 6800 full face respirator (valve sealed off with a taped surgical, extra surgical over top for security theatre; 2) Unvalved GVS Elipse elastomeric; 3) 3M 6200 with the...
exhalation filter; 4) 3M Aura FFP3 (non-elastomeric); 5) Generic Amazon N95s; 6) Surgical masks (reliable way to catch Omicron).

I walk up to the gate officer, wanting to clear things in advance. He's at a counter behind a rope, so I duck under the rope to walk up.

"DON'T...
CROSS THE ROPE!"

"Oh, sorry, I was just wanting to talk with y.."

"YOU CANNOT BOARD YET!"

".. No, I'm not trying to board, I just wanted to talk with you about the mask."

"YOU CANNOT WEAR THAT MASK. ONLY a medical mask."

"I have two medical masks on..."

"THAT MASK IS...
PROHIBITED, understand? Only surgical and unvalved N95, N99 and similar"

"Okay, well, I have this other mask.." (I break out the Elipse) "You can see here on its datasheet ("unvalved" circled in red) that it meets your requirements."

"NO UNVALVED MASKS."

"But it doesn't...
have a valve, see here."

(Beat) "FINE, I'll discuss it with the crew." (walks off in a huff into the plane)

At this point I'm really regretting have gone up to talk with him.

I sit down and wait. 10 minutes later he comes up to me, looking angry as always. "LISTEN CLOSELY....
You must check those masks or leave them in Reykjavík. You are only allowed to to wear a medical mask, NOT a mask with a valve."

"But it says here," for healthcare workers" and "no valve"...

"LET ME FINISH. NO VALVES."

"But it doesn't have one, look."

"NO VALVES."

He...
storms off. While he's gone, I try to talk to the (quiet) other gate agent, but when I get up to do so, the first guy shots back, "YOU ARE ABANDONING YOUR BAGS."

"I can see them..."

"IT IS PROHIBITED TO ABANDON YOUR BAGS"

The other guy just looks on. I give up.

I stay...
well masked until boarding, then change into the Aura. I get up to the gate.

"THE PILOT HAS DECIDED TO DENY YOU ACCESS TO THE PLANE."

"But I'm I'm in the mask you wanted!"

"THE PILOT HAS DECIDED. THIS IS FINAL. GOODBYE."

I'm at the gate, in tears. The other gate agent...
stays silent, not wanting to get involved. There's one woman yet to board, who watched what happed,and is clearly disturbed. She tries to talk to them and keeps gesturing at me, but the angry gate agent keeps shutting her down. She starts to walk down the ramp, looks back...
through the glass at me in tears, and walks back up the ramp and starts angrily arguing with the gate agents while gesturing at me. The angry agent is having none of it, and marches her down the ramp and onto the plane.

So how was your day? 😞

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More from @enn_nafnlaus

Jan 18
@TeslaStars Demonstrably, his claims aren't true, given the overloaded hospitals all over the world. But to be more specific.

1) His first *preprint* actually says that there's 95% odds that the risk of death is "1% to 81% as high as Delta" (Delta being ~2x that of Alpha)
@TeslaStars Note that that's *unadjusted* hazard ratios (single-factor), and that the adjusted hazard ratios (which they didn't even bother trying for for mortality, given the huge CIs) trend to higher hazard ratios than the unadjusted.
@TeslaStars 2) Paxlovid is awesome, but it's also unobtanium, and will continue to be for quite some time. Pfizer hopes to make 120 million treatments (for a planet of 8 billion people) this year, but mainly in the second half. Experts are dubious:
endpts.com/pfizer-says-it…
Read 20 tweets
Jan 17
Interesting preprint, but it has issues.

1. They added in a control group during their revision, but there's relatively little information about them; they barely get mentioned in the paper.

2. The "control group" isn't actually "people who've never been infected" - it's...
"people who were invited because they got a negative result at the time the other subjects got a positive result". It's unclear if anything was done to ascertain a lack of infection beyond this (possible question on the questionnaire?). There is no discussion of serology.
3. Most single-dose individuals were infected than vaccinated, while most two-dose individuals were vaccinated then infected. A poor showing for single-dose individuals mainly just implies that "vaccination doesn't cure Long COVID", and doesn't say much about prevention.
Read 9 tweets
Jan 13
Really concerning paper. I really want to know the biological mechanism behind this.

nature.com/articles/s4159…

Summary:

(a) COVID patients (community-enrolled), whether with Long COVID (LC) or not (MC), have dramatically elevated interferon levels persisting 4 months after...
..infection - something not seen in uninfected controls (UHC) or people who caught "cold" coronaviruses (HCoV). As a reminder, interferons are cytokines sound the alarm call to viral infection and form a complex regulatory network of pro- and anti-inflammatory signals. Elevated..
...levels of pro-inflammatory interferons - as observed - promote aggressive T-cell responses; symptoms can range from asymptomatic to feeling ill to serious pathological states.

(b) While in non-Long COVID patients most IFN levels have significantly declined by 8 months, in...
Read 13 tweets
Jan 12
My "there must be something wrong with this preprint" sense is tingling but it's hard to pinpoint.

medrxiv.org/content/10.110…

Summary: sniffer dogs can detect Long COVID patient sweat samples 51,1% of the time with a 0% false positive rate on controls.
Handlers are blinded to the sample locations, so not a Clever Hans effect. There's detail about how patients were sampled but not controls, though one presumes it's the same. I rather suspect unintentional scent marking distinctions, either in handling of samples...
... or in things that Long COVID patients tend to do (or not do) that the general public does not, rather than a dog-detectable odour eminating from their bodies. It's easy to accidentally mark samples with odours that humans cannot detect.
Read 5 tweets
Dec 27, 2021
Thread: Mask Fit Testing

This evening, I decided to put all of my masks to a proper qualitative fit test using a nebulizer, bitrex solution, and improvised hood. From the upper left, counterclockwise:

1. HygoStar MP9017 surgical mask
2. Demetech DT-N95-FH N95 mask (Amazon)
3. Wisent BAU 4837 FFP2 mask (hardware store)
4. 3M Aura 9330+ FFP3 mask (Amazon; used for ~20h)
5. 3M Aura 9320+ FFP2 mask (Amazon; new)
6. 3M Aura 9330+ FFP3 mask (Amazon; new)
7. GVS Elipse SPR 644 P100 unvalved elastomeric respirator (Amazon)
8. 3M 6800 elastomeric full face respirator (valved) with 3M 2135 P3 R particle filters.

Test setup:

A cheap portable nebulizer was purchased on Amazon:

amazon.com/dp/B08FF3TW59?…

While you can test with stevia or saccharin, bitrex is generally considered to be the easiest...
Read 20 tweets
Dec 24, 2021
Interesting preprint on anosmia / dysosmia associated with SARS-CoV-2

medrxiv.org/content/10.110…

Summary: In SARS-CoV-2 patients, there's dramatic alteration of gene expression in the olfactory bulb of the brain, yet this doesn't correlate with the virus's presence or absence...
... in the olfactory bulb. Seeking to explain this, they checked for a marker of connectivity of sensory nerve fibres (afferants) called OMP-1, and as controls looked at a marker for olfactory lesions (TH) and general. neural activity (SNAP-25)

Results?
OMP-1 - the connectivity marker - was highly depleted in COVID patients (A) with anosmia, in comparison to non-COVID patients. No difference was seen in the marker for lesions (TH) or neural activity (SNAP-25). It thus appears that the pathology is upstream of the olfactory bulb. Image
Read 10 tweets

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