Development of antibodies is the method by which we derive immunity to a pathogen. Tracking of the development of antibodies to SARS-CoV-2 (Covid-19) is important in our understanding of this pandemic and formation of an exit strategy. Antibodies can identify different parts or proteins of a pathogen known as antigens. Current tests do not distinguish which antigens antibodies have been developed against or the level of antibody production. Using protein arrays, printed at the LIH RPPA facility we will provide a more complete analysis of the antibody development.