Influenza Antigen B/Utah/9/2014 (Cell Derived)( Influenza Reagent ) Having trouble viewing this email? View it as a Web page. Dear colleague, The following products are now available on the NIBSC website: Influenza Antigen B/Utah/9/2014 (Cell Derived) ( Influenza Reagent ) 28-05-2015 01:00 AM BST 15/100