The S:N501 and S:E484 builds are now updated with data from 20 Jan! 🎉

There are almost 400 new non-UK and non-South Africa sequences in 501Y.V1 (B.1.1.7 #b117) & 501Y.V2.

And 8 new sequences in 501Y.V3 & 20B/S.484K (primarily circulating in Brazil)



There are 394 new non-UK sequences in 501Y.V1 from the Netherlands, Denmark, Singapore, Australia, Italy, Spain, France, Ireland, Finland, Sweden, the USA, Switzerland, India, Brazil, Slovakia, & Belgium



Denmark has 125 new sequences (orange) - many linking to older sequences & clusters, indicating ongoing local transmission (pic 1).

Netherlands has 14 new sequences (yellow) - many linking to older sequences and clusters, likely indicating local transmission (pic 2).


Belgium has 75 new sequences showing a broad diversity and indicating many introductions. Some new sequences form clusters that may indicate local transmission.


Italy has 46 new sequences (orange), including a large cluster in Abruzzo.
Zooming (divergence view) we can see these sequences mix with older samples, and so may indicate local transmission.


Ireland has 31 new sequences (orange), indicating many separate introductions, and some clustering with older sequences.


Finland has 26 new samples (yellow). These are mix of separate introductions and links to older sequences, indicating local transmission.


India has 13 new sequences (orange & yellow). These are a mix of separate introductions and links to older sequences.


France has 12 new seqs (orange & yellow). These are mostly separate introductions, though a few link with older sequences, potentially indicating local transmission (pic 1, 2).

Spain has 9 new seqs, a mixture of new introductions and linking with older sequences (pic 3).


Slovakia has 12 new sequences: 1 new separate introduction and a large cluster, which also has sequences from other countries in continental Europe.


USA has 11 new sequences (yellow), from Oregon, California, Utah, New Mexico, Oklahoma, Illinois, Michigan, Maryland, & New York. These are a mix of separate introductions & connections to older sequences.


Switzerland has 9 new sequences (orange, some yellow). Though hard to see, most of these do not connect to older sequences. (pic 1)

Singapore has 5 new sequences (yellow and orange) which indicate separate introductions. (pic 2)


Australia has 3 new sequences, indicating separate introductions. (pic 1)

Sweden has 3 new samples, which represent separate introductions (though two new samples are linked). (pic 2)

Brazil has 1 new sequence, a separate introduction. (pic 3)


There are 4 new non-South African sequences in 501Y.V2 from France, and Australia, as well as almost 100 new sequences from South Africa.



France has 3 new sequences, which represent 1 separate introduction and two new sequences are close to older sequences, but may represent a common source.


Australia has 1 new sequence, representing a separate introduction. (pic 1)

Finland has 1 new sequence, a separate introduction. (pic 2)

We can also a see almost 100 new sequences from South Africa that belong to the 501Y.V2 variant. (pic 3)


There are new sequences in 20B/S.484K from Brazil (2), the USA (Georgia - 1), the UK (3), and Denmark (1).



There is 1 new sequence in 501Y.V3, from South Korea.



As usual, country plots are updated. As always, interpret these with care - countries are often preferentially sequencing S-drop-out and S:N501 samples, which means frequencies shown are often not representative!