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. 2020 Dec 10;12(12):1420. doi: 10.3390/v12121420

Figure 1.

Figure 1

Results of RATs plotted based on the Cq value of RT-qPCR and days after onset. Viral antigens in 76 clinical specimens (7 gargle lavages, 27 saliva, 2 T swabs, 1 nasal vestibule swabs, 18 N swabs, 4 sputum, and 17 tracheal aspirates) were examined by Standard Q COVID-19 Ag, Espline SARS-CoV-2, QuickNavi COVID19 Ag, and ImmunoAce SARS-CoV-2. Two independent experiments were performed. All specimens were also tested by RT-qPCR and subjected to virus isolation. Open red circles indicate specimens from which virus was isolated; open black circles indicate specimens from which virus was not isolated. Circles filled in black indicate both results were positive, those filled in gray indicate that one was positive, no color indicates both were negative.