Sequences seen: 50
First seen on: 2023-01-31
Last seen on: 2023-12-26
More data: https://outbreak.info/situation-reports?pango=XBB.2.4
Note: In the above data, "seen" refers to the date the sample was collected, unless that date was not provided for a sequence, in which case it refers to the date it was submitted to NCBI.