07/20/2021: Lab Advisory: SARS-CoV-2 Variant Classification Updates
Audience: Individuals Performing COVID-19 Testing
Level: Laboratory Advisory
On July 20, 2021, CDC announced that SARS-CoV-2 variant AY.3 is now aggregated with Delta variant B.1.617.2. As new data become available, CDC will continue to evaluate the independent classifications of AY.1, AY.2, and AY.3.
Additionally, SARS-CoV-2 variant P.2 (Zeta) is no longer classified as a variant of interest due to declining prevalence and very few detections in recent months. CDC continues to monitor all variants circulating within the United States.
For more information, please visit the SARS-CoV-2 Variant Classifications and Definitions page and the COVID Data Tracker.
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For questions, contact us at LOCS@cdc.gov.
Thank you,
The Laboratory Outreach Communication System
Laboratory Outreach Communication System (LOCS) | Division of Laboratory Systems (DLS)
Center for Surveillance, Epidemiology, and Laboratory Services (CSELS)
Centers for Disease Control and Prevention (CDC)