has role protective antigen role protective antigen Influenza virus protein HA from Influenza B virus (Strain B/England/222/82) Allen Xiang Immunization and challenge experiments in mice indicated that even though vaccination with the recombinant HA vaccinia viruses derived from Influenza B virus (Strain B/England/222/82) induced different levels of cross-reactive neutralizing antibodies, mice vaccinated with either recombinant vaccinia virus were protected from infection with either subpopulation of influenza virus [PubMed: 3318092]. Protegen ID: 522; NCBI Protein GI: 122955; NCBITaxon: 11527 Oliver He protein