CD79A and infection: The concentration of IgA to Rotavirus A VP4 outer capsid protein was associated with a delayed time to infection in the infant (HR: 0.61, CI: 0.38–0.98, P = 0.042, PFDR = 0.2, n = 92 cases,), and the concentration of IgA to Campylobacter jejuni PEB4 major antigenic protein was associated with a reduced time to infection in the child (HR: 1.79, CI: 1.2–2.7, P = 0.005, PFDR = 0.08, n = 116 cases) (Figure 9).