US COVID-19 cases caused by variants
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields



Publication Date Range:


Document Data


Document Type:






Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page



Up-to-date Information

Up-to-Date Info: To find the latest CDC information on this topic go to:

US COVID-19 cases caused by variants

Filetype[PDF-455.66 KB]

  • English

  • Details:

    • Description:
      Updated Mar. 25, 2021

      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 o n 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.

    • Document Type:
    • Place as Subject:
    • Main Document Checksum:
    • File Type:

    Supporting Files

    More +

    You May Also Like

    Checkout today's featured content at