“Subunit” influenza vaccines undergo additional purification steps prior to final formulation intended to highly enrich for the HA protein.22 We also modified our experiments to include detection of proteins from influenza B viruses, HA-B and M1-B, using antibodies that are able to recognize the proteins from the two different lineages of influenza B virus (B/Yamagata/16/88-like and B/Victoria/2/87-like) that are included either alone (in trivalent inactivated vaccine (TIV)) or together (in QIV). This evidence concerns the gene PPIB and influenza.