Fig. 1: Diagnostic workup for case 1 and 2.

a Transverse CT scan showing lung infiltrates suspicious for COVID-19 disease for case 1. b CRISPR analysis testing for the presence of the viral genome in the shown sample of case 1. We used genomic RNA extracted from heat-inactivated SARS-CoV-2 (NR-52347, BEI) as positive control, and human RNA isolated from HEK293T cells as negative control. Each experiment was run in triplicate. Values that are 3 SD above the negative control mean were considered positive. The level of fluorescence does not reflect viral load, this is a qualitative test. c CRISPR analysis testing for the presence of the viral genome in the shown sample of case 2 tested as in b.