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SARS-CoV-2 variants detected by each duplex rRT-PCR assay. SARS-CoV-2/B (hCoV-19/Wuhan/IVDC-HB-04/2020) was used as a control. (A) SARS-CoV-2/B.1.351 variants detected by ORF1ab and S484K assays. (B) SARS-CoV-2/B.1.1.7 variants detected by ORF1ab and S501Y assays. ORF: Open reading frames; rRT-PCR: Real-time reverse transcription-polymerase chain reaction; SARS-CoV-2: Severe acute respiratory syndrome coronavirus 2.
