FCGR3B and parasitic infectious disease: Indeed, this allele, combined with FCGR2A-131R and FCGR3B-NA1, was indicated to be associated with high levels of parasitemia in children from western Kenya, while the FCGR2A-131R/FCGR3A-158F/FCGR3B-NA2 haplotype was associated with susceptibility to severe malarial anemia (SMA) (56).