CD79A and necrotizing enterocolitis: Oral administration of IgG or a combination of IgG and IgA did not result in a reduced incidence of NEC (RR 0.84, 95% CI 0.57–1.25), need for NEC related surgery (RR 0.21, 95% CI 0.02–1.75) or death from NEC (RR 1.10, 95% CI 0.47–2.59) in a meta-analysis [229], with low to very low certainty of evidence (GRADE approach).