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The past year has seen the rapid global spread of SARS-CoV-2—the virus responsible for the ongoing COVID-19 pandemic. While non-pharmaceutical inter ventions have been the mainstay of epidemic control to date, vaccination is likely to constitute the definitive, long-term defence strategy against SARS-CoV-2 morbidity, mortality, and transmission, offering the best hope of a return to normal life. The urgent need for effective vaccines has prompted vaccine developers to pivot towards COVID-19, resulting in rapid growth of preclinical candidates (appendix) and an accelerated vaccine development pipeline. 1 In response to the unfolding pandemic and the extraordinary volume and pace of global vaccine research, we developed an online, interactive vaccine tracker hosted by the Vaccine Centre (VaC) at the London School of Hygiene and Tropical Medicine (LSHTM; London, UK). Launched in April 2020, this …