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Schematic representation of the structure for data sharing at the subnational, national and global levels as provided in the WHO COVID-19 vaccine safety surveillance manual. AEFI, adverse event following immunisation; EPI, expanded programmes on immunisation; NIP, national immunisation programme; NRA, national regulatory authority; PV, pharmacovigilance; PQ, prequalification; WHO PIDM, WHO Program for International Drug Monitoring.
