Neonatal sepsis is a life-threatening condition in newborns, typically defined as a systemic infection occurring within the first 28 days of life. It can be caused by various bacterial, viral, or fungal pathogens. Neonatal sepsis is categorized into early-onset sepsis (EOS), occurring within the first 72 hours of life, and late-onset sepsis (LOS), occurring after 72 hours.