Serum antibody fingerprinting of SARS-CoV-2 variants in infected and vaccinated subjects by label-free microarray biosensor.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work has received funding from Ministero dell’Università e della Ricerca through grants: CN00000041 “National Center for Gene Therapy and Drugs based on RNA Technology” (CUP G43C22001320007, PNRR MUR-M4C2-Investimento 1.4, funded by European Union—NextGenerationEU); FISR 2020 COVID, “VIAEREA” project No. FISR2020IP-04633; PRIN 2017, project No. 2017Z55KCW; “Erogazione liberale per le attività di ricerca sul Coronavirus”, No. LIBVT20COVID19SEPIS; and Fondazione “Romeo ed Enrica Invernizzi” No. LIBVT21BAND. LC and TI were supported by young scientist fellowships from the UNIMI GSA-IDEA project. The authors acknowledge support from the University of Milan through the APC initiative."