The creation of flu vaccine is a long process that involves growing genetically engineered flu strains in Gallus gallus (chicken) eggs, and purifying vaccine particles and antigens for vaccine preparation, with primary focus on Hemagglutinin (HA) and Neuraminidase (NA), two surface proteins that are strongly involved in lymphocyte B cell antibody (Ab) responses to the flu [34–37]. This evidence concerns the gene XK and influenza.