Dr. Yahaya Mohammed is the Project Coordinator of the Gavi-led Zero Dose Learning Hub (ZDLH) at the African Field Epidemiology Network (Nigeria). He is also a Professor, Consultant Clinical Microbiologist and Public Health Microbiologist at Usmanu Danfodiyo University, Sokoto, Nigeria. He has led and supported national outbreak responses including COVID-19, Lassa fever outbreak and contributed significantly to research on vaccine-preventable and other infectious diseases in Nigeria.