Widely recognize Influenza A Nucleoprotein. Has cross-reactivity in WB and ELISA with: H1N1 (A/Brevig Mission/1/1918) NP; H3N2 (A/Darwin/9/2021)/(A/Darwin/6/2021) NP Protein; H5N1 (A/Texas/37/2024) NP Protein. Has cross-reactivity in ELISA with: H1N1 (A/