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. 2022 Apr 8;209:114222. doi: 10.1016/j.bios.2022.114222

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Fig. 5 — Clinical samples diagnostics employing gold immunoassays. (A) Schematic illustration of the comparison between the point-of-care ultrafast immunoassay and the standard - qRT-PCR detection methods. (B) Impedimetric spectra registered for Au sensor after incubation in a solution of positive samples (saliva swabs containing SARS-CoV-2) and negative samples (saliva swabs lacking SARS-CoV-2 but containing other pathogens (three samples) or from healthy patients (two samples)) (C) Comparison between Ct and ΔRct for the tested samples. (D) Cross-reactivity testing of the antibody with different upper respiratory tract viruses such as Influenza A, Human Rhinovirus, and RSV.