Marco Sáfadi, MD, PhD, is the head of the Department of Pediatrics and the coordinator of the post-graduate course on health sciences at Santa Casa de São Paulo School of Medical Sciences. He has been working as a member of the Permanent Advisory Board on Immunization Practices for the Secretary of Health in the State of São Paulo and the Ministry of Health in Brazil for more than 10 years. He is currently chairman of the Department of Immunization for the Society of Pediatrics, São Paulo, and chairman of the Department of Infectious Diseases for the Brazilian Society of Pediatrics. Professor Sáfadi is an active member of many societies, including SLIPE (Latin American Society of Pediatric Infectious Diseases) and ESPID (European Society of Paediatric Infectious Diseases). He is currently a member of the International Scientific Committee (ISC) for WSPID (World Society for Pediatric Infectious Diseases) and was the first nominated liaison representative for SLIPE at the Committee on Infectious Diseases (COID) – Red Book – American Academy of Pediatrics, from 2011 to 2015. He is also a member of the Steering Committee of the Global Meningococcal Initiative (GMI) and a member of the Scientific Advisory Group of the recently merged Confederation of Meningitis Organisations (CoMO) and the Meningitis Research Foundation (MRF). He is an expert member of the SAGE Working Group on Meningococcal Vaccines and Vaccination of WHO and a liaison representative for the Brazilian NITAG in the SAGE Immunization Group from WHO. In 2021, Professor Sáfadi was nominated as a member of the Coalition for Epidemic Preparedness Innovations (CEPI) Scientific Advisory Committee. Professor Sáfadi is a member of the editorial boards of Jornal de Pediatria (JPed), Pneumonia BMC, and The Journal of Pediatrics. He has authored book chapters and original peer-reviewed scientific papers in international journals, namely on immunization, meningococcal and pneumococcal infections, influenza, RSV, coronavirus, rotavirus and norovirus gastroenteritis, pertussis, arboviruses, and congenital and community-acquired infections.