[viruses]
   Realm Riboviria
     Phylum Negarnaviricota
       Subphylum Polyploviricotina
         Class Insthoviricetes [monotypic]
           Order Articulavirales
             Family Orthomyxoviridae
               Genus Betainfluenzavirus [monotypic]
                 Influenza B virusᵀ