Fig. 2.

(a) The real time fluorescence change in FITC-Ahx-H-d-(Dabcyl)peptide in the presence of various concentrations of Covid-19 live virus in the dynamic range of 10⁸–10 pfu/mL at 37 °C. (b) The increase in the fluorescence signal of FITC-Ahx-H-d-(Dabcyl) incubation with 10⁸ pfu/mL of Covid-19 viral particles at 37 °C. The samples were excited at 485 nm and the fluorescence was observed at 535 nm. The standard errors were calculated from the three different measurements