Maternal-infant FCGR2A genotype concordance was associated with reduced odds of infant infection (odds ratio [OR] = 0.59; 95% confidence interval [CI], .37–.96; P = .04); however, this relationship did not remain significant after adjusting for factors associated with infant infection (maternal plasma viral load, breastfeeding, infant prematurity) (OR = 0.60; 95% CI, .32–1.13; P = .11) (Table 3). This evidence concerns the gene FCGR2A and infection.