Effect of RNase treatment on Taq DNA polymerase-mediated RT-qPCR assays. Taq DNA polymerase (NEB) was used to operate CDC SARS-CoV-2 N1, N2, and N3 TaqMan RT-qPCR assays using SARS-CoV-2 viral genomic RNA that had been pre-incubated either with zero RNase units (panels A-C) or with a combination of 1 unit of RNase A and 40 units of RNase T1 (panels D-F). Representative amplification curves from duplicate experiments using 6000 (black traces), 600 (red traces), 60 (blue traces), 6 (pink traces), and 0 (gray traces) copies of SARS-CoV-2 genomic RNA are depicted.