FCGR3A and meningococcal infection: FcγRIIa, FcγRIIIa, and FcγRIIIb, encoded by FCGR2A, FCGR3A, and FCGR3B, respectively, are shown to be important against meningococcal infection (Fijen et al. 2000; van der Pol et al. 2001).