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 ahead of 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.

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