Inactivated vaccines are not very useful in preventing cross-infection and the shedding of viruses from the nose and throat; [8,9]they are only known to diminish the severity of the influenza symptoms and to prevent complications, especially when compared to intra-nasally administered influenza vaccines (inactivated whole virus, [10]with adjuvants, [11]or live cold-adapted) [9]that elicit a better local immune response (mucosal IgA) in the nose, throat and airways. This evidence concerns the gene CD79A and influenza.