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Paired profiles of maternal and cord IgG concentrations to illustrate transfer by preterm birth and full-term birth. A-C, Visualization of maternal antibody transfer for each mother-infant pair by log-adjusted IgG across prematurity: RSV anti-preF, IAV anti-H3, and IAV anti-H1. H1, A/Michigan/45/2015 HA (H1); H3, A/Hong Kong/4801/2014 HA (H3); IAV, influenza A virus; IgG, immunoglobulin G; preF, prefusion F; RSV, respiratory syncytial virus.
