CD40LG and influenza: MAb CR6261 is one of thirteen human MAbs that were isolated from a combinatorial-display libraries [12] that were constructed from human IgM+ memory B cells of individuals vaccinated with the seasonal influenza vaccine and were found to have broad neutralizing activity against multiple strains that belong to group 1 influenza, encompassing H1N1 seasonal influenza and H5N1 avian influenza.