Quidel is a diagnostic healthcare manufacturer. It specializes in immunoassay development, automated manufacturing, monoclonal antibody characterization and development, and molecular assay development. The products fall into five categories: lateral flow with expertise in infectious disease and reproductive health; direct fluorescent antibodies (DFA) specializing in infectious disease and virology; micro-titer production with a focus on bone and complement pathway markets; fluorescent immunoassay products (Sofia); and molecular diagnostic products including handheld molecular device, AmpliVue.