Introduction: Pertussis is a highly contagious respiratory illness that continues to cause significant morbidity and mortality in infants despite vaccination efforts. The 2024 resurgence in the Philippines, attributed to waning immunity and post pandemic disruptions, prompted intensified immunization campaigns. This study characterizes pertussis admissions at a tertiary hospital in Bataan to guide clinical and public health strategies. Objective: to describe the clinical profile, laboratory findings, and outcomes of pediatric cases admitted from January to August 2024, and identify high risk factors with severe diseases. Methods: Retrospective cohort study using medical records of 100 pediatric patients admitted with pertussis. Cased classified per DOH surveillance criteria. Data on demographics, clinical presentation, vaccination status, laboratory values, and outcomes were collected, anonymized and analyzed using descriptive and inferential statistics (p