COVID-19 Human IgA PharmaGenie ELISA Kit (NP/S1 RBD) (SBRS1728)

The COVID-19 Human IgA ELISA Kit from Assay Genie uses a pre-coated microplate presenting two immunodominant SARS-CoV-2 antigens—the nucleoprotein (NP) and the Spike 1 receptor-binding domain (S1 RBD)—to capture and qualitatively detect human IgA class antibodies in dried blood spots, plasma, or serum samples.

IgA levels serve as an indicator of mucosal immune activity and frequently rise earlier than IgG during acute infection, supporting the kit's use in studies of recent exposure, mucosal antibody kinetics, and seroprevalence in vaccinated or convalescent cohorts. Dried blood spot compatibility allows decentralized, at-home sample collection, which is advantageous for large epidemiological surveys and field studies where venipuncture is impractical.

The indirect ELISA workflow relies on anti-human IgA detection reagent and a TMB chromogenic substrate. Aliquot reconstituted reagents upon first use, store refrigerated, and avoid repeated freeze-thaw cycles of standards and detection antibody to maintain performance across the stated shelf life.