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A brief update to the focal S:N501 builds to start your Friday off right! This one includes data from 7 Jan 21.

We have about 20 new sequences each in 501Y.V1 (B.1.1.7 #b117) & 501Y.V2.

Let's take a look at the new sequences, starting with 501Y.V1

1/14

https://t.co/kT1gFsSZn0

 There are 22 new non-UK sequences in 501Y.V1, including for the first time from Luxembourg (3), & additional seqs from Singapore (1), Australia (4), France (12), & Switzerland (2).

2/14
First, Luxembourg has 3 sequences in 501Y.V1 for the first time. Each represents a separate introduction.

3/14
France has 12 new sequences (orange). Many of these represent independent introductions.

Zooming in (divergence view), we can see 2 new sequences are identical (possible local transmission), & 2 differ by 2 mutations (1 each).

4/14
Australia has 4 new sequences (red and orange) which are spread across the tree, representing separate additional introductions.

5/14
Switzerland has 2 new sequences. One (marked 1st pic) is a clear separate introduction. The other (marked 2nd pic, zoomed, divergence) is from Bern & identical to an earlier sequence from Zurich ('ZH'). This could be local transmission or a common exposure.

6/14
There is 1 new sequence from Singapore (orange).

Zooming in (divergence view), we can see it is identical to 2 older sequences, which may indicate local transmission or a common exposure.

7/14
There are ~19 new non-South African sequences in 501Y.V2, including for the first time from Botswana (6), South Korea (1), & France (1), as well as additional sequences from the UK (~9).

(UK data may be affected by subsampling due to large sequence numbers.)

8/14
At least 9 new sequences from the UK are now in 501Y.V2 (UK data may be impacted by subsampling).

These are a mix of separate introductions & local transmission.

Connections to French sequences are in the next tweet...

9/14
France has 2 sequences in 501Y.V2. They cluster together, which may indicate local transmission or a common source.
They are related to seqs from England, but whether this is European transmission or exposure to common diversity in S Africa can't be distinguished clearly.

10/14
Botswana has 6 sequences in 501Y.V2. One sits apart from the others, indicating at least 2 introductions.

The other 5 cluster together, but are separated by a 1-3 mutations. This could indicate local transmission or transmission from unsampled South African diversity.

11/14
Lastly, South Korea has a sequence in 501Y.V2 for the first time.

12/14
As previously, the country plots are also updated. Lithuania is now added!

Remember: many countries are currently focusing sequencing efforts on S:N501 variants, so frequencies are often not true representations of the 501Y variants.

13/14

https://t.co/c7wlQOLRiq
Finally, we've added a new label to help identify a cluster of sequences with a S:N501*T* mutation currently circulating in Australia.

This is another independent appearance of a S:N501 (again, to T, not Y) mutation, & is not related to 20C/501Y.V2 or 20B/501Y.V1.

14/14

More from Dr Emma Hodcroft

Dr Emma Hodcroft
Dr Emma Hodcroft
@firefoxx66
Happy Tuesday! The latest focal S:N501 build is now updated with sequences from 11 Jan.
There are 101 new sequences in the 501Y.V1 (B.1.1.7 #b117) & 501Y.V2 variants.

Additionally, I'll include some updates on S:E484K in this thread.

1/20

https://t.co/dXx6nk6Llz


There are 97 new non-UK sequences in 501Y.V1, including the first sequences in the cluster from Slovakia, Mexico, & Belgium, plus additional sequences from the Netherlands, Denmark, Australia, Spain, Ireland, & Sweden.

2/20


Slovakia has 10 sequences that fall in 501Y.V1 for the first time. These are closely linked, & likely indicate a single introduction and ongoing transmission (remember: vertical distance is not meaningful on the same branch - position of the 2 English samples is arbitrary).

3/20


Belgium has 5 sequences in 501Y.V1 for the 1st time, indicating 3 separate intros. 3 seqs cluster together (zoomed, divergence), indicating a single introduction. The connection to Netherlands might indicate transmission, or 2 transmissions from same diversity in the UK.

4/20


Mexico also has a sequence that falls into 501Y.V1 for the first time.

5/20
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Dr Emma Hodcroft
Dr Emma Hodcroft
@firefoxx66
The focal S:N501 build has been updated with data from 15 Jan, & includes 164 non-UK, non-South African sequences in 501Y.V1 (B.1.1.7 #b117) & 501Y.V2.

The S:E484 build has also been updated. Includes 501Y.V3 & 20B/S.484K (predominantly in Brazil).

1/16

https://t.co/3bdttjKVl4


There are 161 new, non-UK sequences in 501Y.V1 (B.1.1.7) from the Netherlands, Denmark, Australia, Spain, Norway, Germany, the USA, & Switzerland, and from Turkey and Ecuador for the first time.

2/16


Turkey has 19 sequences in 501Y.V1 for the first time. These indicate many independent introductions, though a few clusters may indicate local transmission, and pairs with common exposure.

3/16


Ecuador has 4 sequences in 501Y.V1 for the first time, which represent 2 separate introductions (pic 2). 3 are identical, and may represent exposure to a common source (pic 3). The connection to the Spanish sequence may be a common source, or onward transmission.

4/16


Denmark has 66 new sequences (orange). A few are independent introductions, though many link with older sequences, showing continuing local transmission.

5/16
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Dr Emma Hodcroft
Dr Emma Hodcroft
@firefoxx66
The latest focal S:N501 build is now up! It includes data from 4 Jan 2021.

We have new sequences in 501Y.V1/B.1.1.7 from Denmark, Singapore, Australia, Italy, Spain, France, Portugal, Germany, Brazil, Jamaica, Luxembourg, Pakistan & the USA.

1/12

https://t.co/FTjvV7T7wL


Denmark has 43 new sequences (in orange). These indicate additional introductions, as well as further expansion of the existing large local transmission cluster we saw previously (shown in zoomed divergence view).

2/12


10 new sequences from Portugal (orange) indicate additional, separate introductions.

3/12


Singapore has 5 new sequences (yellow). These indicate at least 5 separate introductions for the total of 6 sequences, with two identical sequences likely being 1 introduction.

4/12


5 new sequences from the US, from Florida & California (older sequences crossed through).

Zooming in (divergence view) on the California cluster, the relationship between these samples is difficult to infer from phylogenies alone.

5/12
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Dr Emma Hodcroft
Dr Emma Hodcroft
@firefoxx66
The S:N501 build is now updated with data from 25th Jan.

Remember, you can always check on any country by just typing that country name in the 'Filter' box on the left menu!

1/18

https://t.co/FTjvV7T7wL


In the 501Y.V1 (B.1.1.7) variant, here are a few of the non-UK countries with new sequences in this variant, including Denmark, Italy, Spain, France, Portugal, Norway, Germany, the USA, South Kora, & Switzerland, & the UAE, Austria, & Czech Republic for the 1st time

2/18


Denmark has 52 new samples (some yellow), showing both separate introductions and further spread of existing local clusters.

3/18


Spain has 62 new sequences (orange & yellow). Many of these are separate introductions, and a few new sequences form distinct clusters. Some new sequences also cluster closely with older sequences (green).

4/18


France has 72 new sequences (orange & yellow). These show both separate introductions and clustering with older sequences.

5/18
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Dr Emma Hodcroft
Dr Emma Hodcroft
@firefoxx66
Each day brings new challenges, but here's an update to the dedicated S.N501 build, using data from 6 Jan 2021 to keep you going.

There are 42 new non-UK sequences in 501Y.V1 (B.1.1.7) & 7 new non-South-African sequences in 501Y.V2.

1/14

https://t.co/kT1gFsSZn0


There are 42 new non-UK sequences in 501Y.V1 from the Netherlands, Italy, Hong Kong, Finland, Sweden, Germany, USA, Switzerland, Brazil, and the first sequence from 501Y.V1 in Oman.

https://t.co/XA8VR8HiEq

2/14


Oman has their first sequence which falls into 501Y.V1:

3/14


Finland has 12 new sequences (orange), which mostly represent separate introductions. Zooming in (divergence view), we can see 3 of the new sequences are identical (red), which may indicate the cases are connected.

4/14


Sweden has 8 new sequences (orange), which indicate separate introductions.

5/14
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Transgenderism is very controversial territory. ‘Perceived by the victim’ very controversial.

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A comment that is ‘perceived’ to be transphobic.

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Totalitarianism is best understood as the politicization of everything. Every facet of life is infused with political meaning... and subjected to political control. There is little room for privacy or individualism. Every word and deed is seen as a political action.

Totalitarianism does *not* require authoritarian government, although it usually leads to such. You can be totalitarian without having any real government power at all, enforcing your political will through mob actions and corporate power. Examples from recent history abound.

Totalitarianism is the easiest of the three deadly "isms" to slide into, because it can easily be disguised with claims of its good intentions. Totalitarians usually claim to be motivated by the Greater Good. They claim to represent the interests of sympathetic victims.

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needs to be addressed.
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As Beach notes, the intro to the symposium does not present evidence that bias is a problem. This is correct, but there is also no evidence 3/

that confirmation bias is not a problem. It's an absence of evidence situation with regard to comprehensive, direct evidence, i.e. from verification studies of qualitative research (for studies that are built on an epistemology for which the idea of verification makes sense). 4/

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