Common Core Contact Name,Clinton Paden Contact Email,respvirus@cdc.gov Public Access Level,public Bureau Code,009:20 Program Code,009:026 Geographic Coverage,United States Update Frequency,Two Weeks Data Quality Suggested Citation,"Ma KC, Shirk P, Lambrou AS, et al. Genomic Surveillance for SARS-CoV-2 Variants: Circulation of Omicron Lineages — United States, January 2022–May 2023. MMWR Morb Mortal Wkly Rep 2023;72:651–656. DOI: http://dx.doi.org/10.15585/mmwr.mm7224a2" Geographic Unit of Analysis,National (USA); HHS Region Analytical Methods Reference,https://github.com/CDCgov/SARS-CoV-2_Genomic_Surveillance Footnotes,"Lambrou AS, Shirk P, Steele MK, et al. Genomic Surveillance for SARS-CoV-2 Variants: Predominance of the Delta (B.1.617.2) and Omicron (B.1.1.529) Variants — United States, June 2021–January 2022. MMWR Morb Mortal Wkly Rep 2022;71:206–211. DOI: http://dx.doi.org/10.15585/mmwr.mm7106a4; Paul P, France AM, Aoki Y, et al. Genomic Surveillance for SARS-CoV-2 Variants Circulating in the United States, December 2020–May 2021. MMWR Morb Mortal Wkly Rep 2021;70:846–850. DOI: http://dx.doi.org/10.15585/mmwr.mm7023a3" Topics Category,Laboratory Surveillance Tags,"sars-cov-2, covid-19, surveillance, variant surveillance, variant proportion, nowcasting" Licensing and Attribution License,Public Domain U.S. Government Source Link,https://www.cdc.gov