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Table 2 List of SARS-CoV-2 variants of concern (VOCs) and variants of interest (VOIs) (Cascella et al. 2022; WHO 2022b)

From: Current challenges in different approaches to control COVID-19: a comprehensive review

Name of the variant Lineage First reported Date of the first report
Variants of concern (VOCs)
Alpha B.1.1.7 UK, September 2020 December 18, 2020
Beta B.1.351 South Africa, May 2020 December 18, 2020
Gamma P.1 Brazil, November 2020 January 11, 2021
Delta B.1.617.2 India, October 2020 VOI: April 4, 2021 VOC: May 11, 2021
Omicron B.1.1.529 South Africa, November 2021 November 26,  2021
Variants of interest (VOIs)
Epsilon B.1.427/B.1.429 USA, March 2020 March 5, 2021
Zeta P.2 Brazil, April 2020 March 17, 2021
Eta B.1.525 Multiple countries, December 2020 March 17, 2021
Theta P.3 Philippines, January 2021 March 24, 2021
Iota B.1.526 USA, November 2020 March 24, 2021
Kappa B.1.617.1 India, October 2020 April 4, 2021
Lambda C.37 Peru, August 2020 June 14, 2021
Mu B.1.621 Colombia, January 2021 August 30, 2021