Who are the experts and groups around the world approving and regulating the new COVID-19 vaccines? And what do they need to consider amidst the urgency of vaccinating the world? In this episode during World Immunization Week, Naomi Stewart speaks to Prof Annelies Wilder-Smith from the London School of Hygiene & Tropical Medicine. Prof Smith sits on WHO’s Strategic Advisory Group of Experts on Immunization, and walks us through the decisions involved in approving different vaccines - and how it could happen so quickly. If you would like to get in contact with the team, or if you have a question you would like to ask our experts, you can email us: [email protected]