The Centers for Disease Control and Prevention has created a federal classification scheme for SARS-CoV-2 variants and posted information on their prevalence in the United States.

The classification system, developed with the Department of Health and Human Service’ SARS-CoV-2 Interagency Group, identifies variants of “interest,” “concern” or “high consequence” based on their ability to increase transmission or disease severity and impact diagnostics, treatments or vaccines.

CDC plans to update the pages as new variants emerge and add model-based estimates of their prevalence.

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