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The new Variant Under Investigation (VUI) was re-designated Variant of Concern (VOC) 202012/01 on 18 December
This is an excellent report by @PHE_UK, but it’s a bit technical so I’ll try to unpick it for you
https://t.co/M9f3zaimF5
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90% were from <60 years old (further detail not yet available here)
6 patients had already died
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Of note, 3 of the main testing labs use a PCR test for 3 different viral genes: N, ORF1ab, S.
The new VOC has a mutation that makes this test negative for S (spike), but positive for the others.
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Because of the way genetics works, 6 of these don’t actually change viral proteins (so-called synonymous mutations).
13 change amino acids of a viral protein (see Figure)
4 remove a small piece of a protein
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https://t.co/f5JWWUOaqy
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Although N501Y has not yet been tested, other mutations at 501 decrease the effectiveness of LYCoV016, a monoclonal antibody developed to treat COVID19
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They deserve our thanks!
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More from Health
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Why do B12 and folate deficiencies lead to HUGE red blood cells?
And, if the issue is DNA synthesis, why are red blood cells (which don't have DNA) the key cell line affected?
For answers, we'll have to go back a few billion years.
2/
RNA came first. Then, ~3-4 billion years ago, DNA emerged.
Among their differences:
🔹RNA contains uracil
🔹DNA contains thymine
But why does DNA contains thymine (T) instead of uracil (U)?
https://t.co/XlxT6cLLXg
3/
🔑Cytosine (C) can undergo spontaneous deamination to uracil (U).
In the RNA world, this meant that U could appear intensionally or unintentionally. This is clearly problematic. How can you repair RNA when you can't tell if something is an error?
https://t.co/bIZGviHBUc
4/
DNA's use of T instead of U means that spontaneous C → U deamination can be corrected without worry that an intentional U is being removed.
DNA requires greater stability than RNA so the transition to a thymine-based structure was beneficial.
https://t.co/bIZGviHBUc
5/
Let's return to megaloblastic anemia secondary to B12 or folate deficiency.
When either is severely deficient deoxythymidine monophosphate (dTMP*) production is hindered. With less dTMP, DNA synthesis is abnormal.
[*Note: thymine is the base in dTMP]
https://t.co/AnDUtKkbZh
Why do B12 and folate deficiencies lead to HUGE red blood cells?
And, if the issue is DNA synthesis, why are red blood cells (which don't have DNA) the key cell line affected?
For answers, we'll have to go back a few billion years.
2/
RNA came first. Then, ~3-4 billion years ago, DNA emerged.
Among their differences:
🔹RNA contains uracil
🔹DNA contains thymine
But why does DNA contains thymine (T) instead of uracil (U)?
https://t.co/XlxT6cLLXg
3/
🔑Cytosine (C) can undergo spontaneous deamination to uracil (U).
In the RNA world, this meant that U could appear intensionally or unintentionally. This is clearly problematic. How can you repair RNA when you can't tell if something is an error?
https://t.co/bIZGviHBUc
4/
DNA's use of T instead of U means that spontaneous C → U deamination can be corrected without worry that an intentional U is being removed.
DNA requires greater stability than RNA so the transition to a thymine-based structure was beneficial.
https://t.co/bIZGviHBUc
5/
Let's return to megaloblastic anemia secondary to B12 or folate deficiency.
When either is severely deficient deoxythymidine monophosphate (dTMP*) production is hindered. With less dTMP, DNA synthesis is abnormal.
[*Note: thymine is the base in dTMP]
https://t.co/AnDUtKkbZh
Let's talk honestly about "informed consent."
Someone with decades of training gives someone with none advice usually packed into 1-3 mins. Huge amount is based on trust. Huge potential for bias built in. But also there is no obligation to provide real alternative options.
I am classified as 'gifted' (obnoxious and ableist term). I mention because of what I am about to say. You all know that I was an ambulatory wheelchair user previously - could stand - but contractures have ended that. When I pleaded for physio, turned down. But did you know...
I recently was chatting with a doctor I know and explaining what happened and the day the physiatrist told me it was too late and nothing could be done. The doctor asked if I'd like one of her friends/colleagues to give second opinion. I said yes please! So...
She said can you send me MRI and other imaging they did to determine it wasn't possible to address your contractures.
Me: What?
Dr.: They did a MRI first before deciding right?
Me: No
Dr: What did they do??!
Me: Examined me for 2 minutes.
Dr: I am very angry rn. Can't talk.
My point is you don't even know if you are making "informed" decisions because the only source of information you have is the person who has already decided what they think you should do. And may I remind you of a word called 'compliance.'
Someone with decades of training gives someone with none advice usually packed into 1-3 mins. Huge amount is based on trust. Huge potential for bias built in. But also there is no obligation to provide real alternative options.
MAiD isn't eugenics. The task for the medical profession is to ensure informed consent. Failures on that front should result in enforcement of the law. But Bill C-7 is the result of the existing regime imposing unnecessary, unconstitutional harms by blocked access to MAiD.
— Emmett Macfarlane (@EmmMacfarlane) February 13, 2021
I am classified as 'gifted' (obnoxious and ableist term). I mention because of what I am about to say. You all know that I was an ambulatory wheelchair user previously - could stand - but contractures have ended that. When I pleaded for physio, turned down. But did you know...
I recently was chatting with a doctor I know and explaining what happened and the day the physiatrist told me it was too late and nothing could be done. The doctor asked if I'd like one of her friends/colleagues to give second opinion. I said yes please! So...
She said can you send me MRI and other imaging they did to determine it wasn't possible to address your contractures.
Me: What?
Dr.: They did a MRI first before deciding right?
Me: No
Dr: What did they do??!
Me: Examined me for 2 minutes.
Dr: I am very angry rn. Can't talk.
My point is you don't even know if you are making "informed" decisions because the only source of information you have is the person who has already decided what they think you should do. And may I remind you of a word called 'compliance.'
