IF YOU ARE FULLY VACCINATED
CDC has updated its guidance for people who are fully vaccinated. See Recommendations for Fully Vaccinated People.
IMPORTANT UPDATE FOR SCHOOLS
CDC recommends schools continue to use the current COVID-19 prevention strategies for the 2020-2021 school year. Learn more
Important update: Healthcare facilities
CDC has updated select ways to operate healthcare systems effectively in response to COVID-19 vaccination. Learn more

US COVID-19 Cases Caused by Variants

US COVID-19 Cases Caused by Variants

This page will no longer be updated after April 12, 2021. Current data showing the prevalence of variants in the United States is available in the COVID Data Tracker.

Variant

Reported Cases in US

Number of Jurisdictions Reporting

Variant

B.1.1.7

Reported Cases in US

20915

Number of Jurisdictions Reporting

52

Variant

B.1.351

Reported Cases in US

453

Number of Jurisdictions Reporting

36

Variant

P.1

Reported Cases in US

497

Number of Jurisdictions Reporting

31

Cases of Variants of Concern in the United States*†

Download Accessible Data [XLS – 877 B]

CDC is closely monitoring these variants of concern (VOC). These variants 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).

The map above displays reported data on three VOCs, B.1.1.7, B.1.351, and P.1. Variants B.1.427 and B.1.429 have recently been classified as VOCs but are currently not featured on this map. Additional data is available on Variant Proportions in the US.

03/14/21 – To maintain a limited number of colors and allow for an easier comparison between states, the data ranges have changed from 1-100 to 1-150.

*The cases identified above 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.