Recombinant Humanized Anti-HA Antibody scFv Fragment (809) (CAT#: HPAB-N0123-YC-S(P))

Provided is a broad-spectrum neutralizing antibody for influenza virus B. The broad-spectrum neutralizing antibody is a human monoclonal antibody and is named as 809. It can well neutralize the influenza virus B of a Yamagata strain, a Victoria strain and ancient B/Lee/1940 strains; the antibody can inhibit the ability of the influenza virus B agglutinating chicken erythrocyte, and is a hemagglutination inhibition antibody; meanwhile, the antibody can inhibit replication of the influenza virus B in mice, inhibits weight loss of the mice due to infection of the influenza virus B, protects the mice to still have a survival rate of 100% after infection of the influenza virus B, and has important economic and social significances.