When an infant is born, their first introduction is to a new immune system and new bacteria. Tim Hand, PhD, assistant professor with the Richard King Mellon Foundation Institute for Pediatric Research, takes samples from the neonatal intensive care unit (NICU) at UPMC Magee-Womens Hospital, to look at how antibodies in a mother’s breast milk may shape the relationship between an infant and their microbiome. Listen in as Dr. Hand discusses the unique microbiome of premature infants, necrotizing enterocolitis (NEC), and how maternal IgA, an active component in a mother’s breast milk, can shape a child’s immune system.