these numbers. RT-LAMP CT Pos Neg Sum RT-qPCR Pos 0–25 51 0 51 25–30 28 2 30 30–35 4 16 20 35–40 0 16 16 Neg Neg 2 649 651 Sum 85 683 768 The consistency of the results during the analysis confirmed a threshold of ΔOD > +0.3 as a robust measure to identify samples that were positive for SARS-CoV-2 RNA (Fig. 3A). R