Recognizes Influenza H1N1 (A/Puerto Rico/8/1934) Hemagglutinin/HA; No cross-reactivity in ELISA with: H1N1 (A/Victoria/4897/2022) HA Protein; H1N1 (A/Wisconsin/588/2019)/(A/Victoria/2570/2019) HA Protein; H1N1 (A/Wisconsin/67/2022) HA Protein; H3N2 (A/Da