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Biosensor cross-response against the SARS-CoV-2 nucleocapsid (NC) protein in the 1fg/mL–100 pg/mL concentration range. Vero/anti-S1 cells membrane-engineered with 0.5 μg/mL of human chimeric antibodies were used as the biorecognition element. Results are presented after three (red columns) or ten minutes (blue columns) of sample–cell interaction. Results are expressed as normalized biosensor responses (% control) (n = 24).
