06/29/2021: Lab Update: SARS-CoV-2 Variant Classification Changes

CDC's Laboratory Outreach Communication System (LOCS)

Audience: Individuals Performing COVID-19 Testing

Level: Laboratory Update

On June 29, 2021, the U.S. Centers for Disease Control and Prevention (CDC) announced the following changes to the SARS-CoV-2 variant classifications:

  • Downgrading B.1.427/B.1.429 (Epsilon) from variants of concern to variants of interest
  • Downgrading variant of interest B.1.617
  • Consolidating variant of interest B.1.526.1 with variant of interest B.1.526 (Iota)

The classification of a specific variant may change as new evidence emerges regarding its attributes. CDC and the SARS-CoV-2 Interagency Group continually review the available scientific evidence as well as the genomic surveillance data to assess the classification of variants.

For more information, please visit the SARS-CoV-2 Variant Classifications and Definitions page.

For questions, contact us at LOCS@cdc.gov.

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Thank you,

Laboratory Outreach Communication System | Division of Laboratory Systems (DLS)

Center for Surveillance, Epidemiology, and Laboratory Services (CSELS)

Centers for Disease Control and Prevention (CDC)