Fig. 5.

AUC values for the 60 gargle samples for the five potential biomarker peak range. The sample data files were labeled 1–60 and the AUC for the biomarker range for each file is depicted. The COVID-19 positive files (red) were clustered and labelled as 1–30 while the COVID-19 negative files (blue) were clustered and labelled as 31–60. A marked difference for the AUC in the biomarker ranges of COVID-19 positive versus COVID-19 negative samples can be observed. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)