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submitted on 13.04.2020 and posted on 15.04.2020by Abdelhadi Djaileb, Benjamin Charron, Maryam Hojjat Jodaylami, Vincent Thibault, Julien Coutu, Keisean Stevenson, Simon Forest, Ludovic S. Live, Denis Boudreau, Joelle N. Pelletier, Jean-Francois Masson
We report a surface plasmon resonance (SPR) sensor detecting nucleocapsid antibodies specific against the novel coronavirus 2019 (SARS-CoV-2) in undiluted human serum. When exposed to SARS-CoV-2, the immune system responds by expressing antibodies at levels that can be detected and monitored to identify the patient population immunized against SARD-CoV-2 and support efforts to deploy a vaccine strategically. A SPR sensor coated with a peptide monolayer and functionalized with SARS-CoV-2 nucleocapsid recombinant protein detected anti-SARS-CoV-2 antibodies in the nanomolar range. This bioassay was performed on a portable SPR instrument in undiluted human serum and results were collected within 15 minutes of sample/sensor contact. This strategy paves the way to point-of-care and label-free rapid testing for antibodies.