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Abstract Since the outbreak of COVID-19, SARS-CoV-2 has generated more than 10,000 variants. Some of them deserve our concern because it may become more infectious, or show increased pathogenicity with higher mortality, or it no longer is detectable with current assays, or it may evade immunoprotection by available vaccines. On May 31, WHO proposed a new system to name SARS-CoV-2 variants. In this review, four worldwide spread SARS-CoV-2 variants were comprehensively discussed including the India variant that is responsible for recent endemic of COVID-19 in Guangzhou.
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Received: 16 June 2021
Published: 01 January 2021
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