Weekly totals of variants in United Kingdom
Week 30 31 32 33 34 35 36 37
XFG 138 193 236 200 110 25
NB.1.8.1 50 57 57 40 33
Total 231 297 332 280 155 29
XFG % 60% 65% 71% 71% 71% 86%
NB.1.8.1 % 22% 19% 17% 14% 21% 0%

Last Updated: 8th September 2025 22:44 BST — Local:

Acknowledgements

We gratefully acknowledge GISAID and the many data contributors around the world for sharing SARS-CoV-2 sequences.

This analysis makes use of the Nextclade CLI.
Aksamentov, I., Roemer, C., Hodcroft, E. B., & Neher, R. A., (2021). Nextclade: clade assignment, mutation calling and quality control for viral genomes. Journal of Open Source Software, 6(67), 3773, https://doi.org/10.21105/joss.03773

Special thanks to Josette Schoenmakers ( @josetteschoenma.bsky.social on BlueSky @JosetteSchoenma on Twitter) for the table concepts.