<qa>  What is the NRNs prior work on infection in VLBW infants?This observational study expands the NRNs prior work on infection in VLBW infants, conducting surveillance of all infants born at network centers who are diagnosed with early-onset sepsis andor meningitis. The study will: establish current hospital-based rates of EOS among term and preterm infants in the era of intrapartum antibiotic prophylaxis; monitor the organisms associated with EOS and meningitis; compare asymptomatic and symptomatic infants by gestational age and pathogen; and monitor sepsis-associated mortality rates by pathogen group. Cases will be identified by the medical care team or through research team review of patient, microbiology, or infection controlhospital epidemiology records. 