| Weekly totals of variants in USA (by specimen date) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Week | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 |
| NB.1.8.1 | 27 | 19 | 18 | 9 | 5 | 5 | 1 | – |
| XFG | 230 | 213 | 163 | 102 | 53 | 27 | 7 | – |
| BA.3.2 | – | – | – | – | – | – | – | – |
| Total | 278 | 251 | 205 | 123 | 62 | 34 | 8 | – |
| NB.1.8.1 % | 10% | 8% | 9% | 7% | 8% | 15% | 13% | – |
| XFG % | 83% | 85% | 80% | 83% | 85% | 79% | 88% | – |
| BA.3.2 % | 0% | 0% | 0% | 0% | 0% | 0% | 0% | – |
Last Updated: 16th December 2025 07:27 GMT — Local: …
Growth Charts
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.