In a sensitivity analysis, including only the 42 cases of infection with increased CRP and/or positive blood culture, infection risk was significantly increased across all BC-fortified infants (HR: 2.3, CI95% 1.1–4.3, P < 0.05, Supplemental Figure S2A), as well as for BC-fortified AGA infants (HR: 2.3, CI95% 1.0–5.4, P = 0.06, Supplemental Figure S2B) and SGA infants (RR: 3.0, CI95% 1.0–9.2, P < 0.05, Supplemental Figure S2C). This evidence concerns the gene CRP and breast cancer.