Pennsylvania neonatology immunology infectious and communicable disease pediatrics expert witnesses bring NICU and pediatric ID expertise from academic centers like CHOP and UPMC Children’s. They often practice in tertiary hospitals and community neonatal units across the Commonwealth, addressing regional perinatal care and infection-control standards. They evaluate sepsis, congenital infections, vaccine-preventable illness, immune deficiencies, and neonatal antimicrobial management.