Figure 2.
Amplification plots of SARS-CoV-2 RNA serial ten-fold dilutions. Dilutions ranged between 5 and 5 × 106 SARS-CoV-2 RNA copies/reaction for the ORF1ab, N, N9, and RdRp assays. Linear correlation coefficients (R2) and efficiencies for each rRT-PCR assay were determined (3 tests/dilution). N: Nucleocapsid; ORF: open reading frames; RdRp: RNA-dependent RNA polymerase; rRT-PCR: Real-time reverse transcription-polymerase chain reaction; SARS-CoV-2: Severe acute respiratory syndrome coronavirus 2.