Serological assays capable of measuring antibody responses induced by previous infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been critical tools in the response to the COVID-19 pandemic. In this study. we use bead-based multiplex assays to measure IgG and IgA antibodies and IgG avidity to five SARS-CoV-2 antigens (Spike (S). receptor-binding domain (... https://www.bekindtopets.com/top-price-2023-K2-RayGun-Snowboard-with-Boots-and-Bindings-limited-super/