Dr. dr. Ari Prayitno, Sp.A(K), is a pediatric infectious disease consultant at Dr. Cipto Mangunkusumo National Referral Hospital and an academic clinician at the Faculty of Medicine, Universitas Indonesia. He obtained his medical degree (1992), completed pediatric residency (2002) and subspecialty training in pediatric infectious diseases (2015), and earned a doctoral degree (2020) from Universitas Indonesia. He began his career as a general practitioner in a primary health care facility in Central Kalimantan (1993-1996), followed by practice as a pediatrician at RS St. Imanuddin (2003–2009). Since 2010, he has served as a medical staff member in the Department of Child Health at Dr. Cipto Mangunkusumo Hospital. He also chaired the Infection Prevention and Control–Antimicrobial Resistance Committee (2017–2024). Since November 2025, he has been the Head of the Department of Child Health, Faculty of Medicine, Universitas Indonesia. His research focuses on pediatric infectious diseases, immunization, dengue, COVID-19, and antimicrobial resistance. He has authored numerous peer-reviewed publications and led multicenter studies, particularly on pneumococcal and COVID-19 vaccines. He is also an active member of the Indonesian Pediatric Society (IDAI), serving on the central board and the immunization task force.