Review Article
Challenges in Emerging Vaccines and Future Promising Candidates against SARS-CoV-2 Variants
Table 1
Nomenclature of SARS-CoV-2 variants.
| WHO label | Pango lineage | GISAID clade/lineage | Nextstrain clade | First documented | Types of variants |
| Alpha | B.1.1.7 | GRY (formerly GR/501Y.V1) | 20I/S:501Y.V1 | UK, September 2020 | VOC | Beta | B.1.351 | GH/501Y.V2 | 20H/S:501Y.V2 | South Africa, May 2020 | VOC | Gamma | P.1 | GR/501Y.V3 | 20J/S:501Y.V3 | Brazil, November 2020 | VOC | Delta | B.1.617.2 | G/452R.V3 | 21A/S:478K | India, October 2020 | VOC | Epsilon | B.1.427/B.1.42 9 | GH/452R.V1 | 20C/S.452R | USA, March 2020 | VOI | Zeta | P.2 | GR 20B | 20B/S.484K Brazil | Brazil, April 2020 | VOI | Eta | B.1.525 | G/484K.V3 | 20A/S484K | Multiple countries (UK, Denmark, Nigeria), December 2020 | VOI | Theta | P.3 | GR | 20B/S:265C | Philippines, January 2021 | VOI | lota | P.3 | GR | 20B/S:265C | USA, November 2020 | VOI | kappa | B.1.617.1 | G/452R.V3 | 21A/S:154K | India, October 2020 | VOI | Omicron | B.1.1.529 | GR/484A | 21K/21L/21M/22A/22B/22C/22D | Multiple countries (South Africa, China, Hong Kong, UK, Germany, Brazil, India, etc., 2021 | VOC |
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