Weekly totals of variants in Sweden (by specimen date)
Week 51 52 01 02 03 04 05 06
NB.1.8.1 3 2 2 1
XFG 17 9 5 5 5
BA.3.2 1
Total 24 11 7 7 5
NB.1.8.1 % 13% 18% 29% 14% 0%
XFG % 71% 82% 71% 71% 100%
BA.3.2 % 4% 0% 0% 0% 0%

Last Updated: 3rd February 2026 21:58 GMT — Local:

Growth Charts

Growth chart for NB.1.8.1
Growth chart for XFG
Growth chart for BA.3.2

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.