Fig. 1

Interpretation of rapid SARS-CoV-2 antigen detection assay (Standard Q COVID-19 Ag Test). Demonstration of a a test strip for viral transport media control, b a test strip, which was interpreted as negative SARS-CoV-2 antigen, c a test strip, which was interpreted as (weakly) positive SARS-CoV-2 antigen, and d a test strip, which was interpreted as positive SARS-CoV-2 antigen. The results were interpreted as positive when both control (c) and SARS-CoV-2 antigen (T) lines appeared within 30 min