TABLE 1.
Nomenclature, emergence, and properties of the SARS-CoV-2 variants
| Labela | VoCb | PANGOc | Nextstrainc | Circulationd |
|---|---|---|---|---|
| Y2020 | – | B, B.1 | 19A, 19B, 20A, 20B | Dec 2019–Dec 2020 |
| Alpha | Alpha | B.1.1.7 | 20I | Oct 2020–Aug 2021 |
| Delta | Delta | B.1.617 | 21A, 21I, 21J | Apr 2021–Dec 2021 |
| BA.1 | Omicron | BA.1 | 21K | Nov 2021–Mar 2022 |
| BA.2 | BA.2 | 21L | Dec 2021–Jun 2022 | |
| BA.5 | BA.5 | 22B | Mar 2022–Mar 2023 | |
| XBB | XBB, XBB.1 | 22F, 23A, 23B, 23C, 23D | Oct 2022–Dec 2023 | |
| EG | EG.1, EG.5 | 23D, 23F | Mar 2023–Oct 2023 | |
| HK | HK.1–HK.34 | 23F | Jun 2023–Jan 2024 | |
| JN.1 | JN, JN.1 | 24A, 24B | Oct 2023–present |
a
Abbreviated designation used in the study.
b
WHO variant of concern assignment.
c
PANGO and Nextstrain lineage designations (from https://cov-lineages.org/lineage_list.html; https://covariants.org).
d
Approximate date range for global circulation (https://nextstrain.org/ncov/gisaid/global/all-time).