CD79A and infection: B cell–mediated humoral immune response plays a central role in controlling RV infections18, 19 with neutralizing serum IgG and secretory IgA in the mucosa detected one to 2 weeks after infection, with a role of protection from re‐infection with the same strand.18, 19 B cells were also found to internalize RV particles and proliferate in response to RV stimulation in vitro.20