CD79A and influenza: The frequencies of influenza-specific IgG and IgA antibody-secreting (ASC) (day 7 post-vaccination) and memory B-cells (days 0, 7, and 56 post-vaccination) in PBMC from the Bris2007 M2SR high-dose and placebo cohorts were tested by direct or stimulated B-cell ELISpot assays, respectively.