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Nomenclature
No consistent nomenclature has been established for SARS-CoV-2, but, the World Health Organization (WHO) is working on "standard nomenclature for SARS-CoV-2 variants that does not reference a geographical location".

While there are many thousands of variants of SARS-CoV-2, subtypes of the virus can be put into larger groupings such as lineages or clades. Three main, generally used nomenclatures have been proposed:


 * , GISAID—referring to SARS-CoV-2 as hCoV-19 —had identified eight global clades (S, O, L, V, G, GH, GR, and GV).
 * In 2017, Hadfield et al. announced Nextstrain, intended "for real-time tracking of pathogen evolution". Nextstrain has later been used for tracking SARS-CoV-2, identifying 11 major clades (19A, 19B, and 20A–20I).
 * In 2020, Rambaut et al. of the Phylogenetic Assignment of Named Global Outbreak LINeages (PANGOLIN) software team proposed in an article "a dynamic nomenclature for SARS-CoV-2 lineages that focuses on actively circulating virus lineages and those that spread to new locations;, six major lineages (A, B, B.1, B.1.1, B.1.177, B.1.1.7) had been identified.