What is really nice about this is that they show response to actual human samples, not just purified spike protein vs. control proteins/blanco buffer controls.

What is really nice about this is that they show response to actual human samples, not just purified spike protein vs. control proteins/blanco buffer controls. This gives me hope that a finalized test could have good specificity... Finally, clinical samples were tested to analyze the performance of the biosensor. Human swab samples from a normal person and a COVID-19 patient were collected separately. The normal sample was loaded onto the device before the addition of the patient sample. Figure 3a clearly shows that patient samples produce a different signal from the normal sample within a couple of minutes. Even after diluting the patient sample 100000 times, clear responses were observed.