SARS-CoV-2 variant case numbers U.S. 2021

As of April 10, 2021, there had been 20,915 reported cases of the B.1.1.7 SARS-CoV-2 variant. SARS-CoV-2 variants act differently than the original disease and therefore may spread more quickly or cause more severe disease. The rise of SARS-CoV-2 variants has become increasingly worrisome in many countries. This statistic shows the number of reported cases of SARS-CoV-2 variants in the United States as of April 10, 2021, by variant type.

Number of reported cases of SARS-CoV-2 variants in the United States as of April 10, 2021, by variant type

Characteristic	Number of cases
B.1.1.7	20,915
B.1.351	453
P.1	497

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Release date

April 2021

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Region

United States

Survey time period

as of April 10, 2021

Supplementary notes

Note from source: "The emerging variants CDC is closely monitoring have mutations in the virus genome that alter the characteristics and cause the virus to act differently in ways that are significant to public health (e.g., causes more severe disease, spreads more easily between humans, requires different treatments, changes the effectiveness of current vaccines). It’s important to understand that genetic mutations are expected, and some variants can spread and become predominant while others subside."
"The cases identified are based on a sampling of SARS-CoV-2-positive specimens and do not represent the total number of B.1.1.7, B.1.351, and P.1 lineage cases that may be circulating in the United States and may not match numbers reported by states, territories, tribes, and local officials."

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