Global COVID-19 vaccine roll-out: time to randomise vaccine allocation?

The global COVID-19 vaccine roll-out might be the largest public health exercise ever done. COVAX, the vaccines access pillar of the COVID-19 Tools Accelerator, supported by WHO, UNICEF, and others, expects to deliver two billion doses to 190 countries in 1 year. At present, 13 vaccines have received approval in various jurisdictions. The roll-out provides an opportunity, unparalleled in human…

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