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Variants

Global Variants Report

Countries that have reported variants of SARS-CoV-2. A new SARS-CoV-2 variant has one or more mutations that differentiate it from predominant virus variants already circulating among the general population. Variants are expected to occur as viruses are constantly changing. Surveillance can help investigate how some variants may impact COVID-19 disease […]

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New SARS-CoV-2 Variants Clinical, Public Health, and Vaccine Implications

Across the world, there are multiple variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (Covid-19). SARS-CoV-2 variants have been classified by the Centers for Disease Control and Prevention (CDC) as variants of interest, variants of concern, and variants of high consequence. Three […]

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SARS-CoV-2 Variants of Concern in the United States—Challenges and Opportunities

On January 10, 2020, the first genomic sequence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) isolated from a patient in Wuhan, China, was posted online. As of February 3, 2021, 468 000 sequences of SARS-CoV-2 from COVID-19 cases globally have been uploaded into publicly available databases, including more than […]

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