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The final stage of lockdown easing should be delayed until more of the population have had both doses of the Covid-19 vaccine, say Professor Christina Pagel (×î×¼µÄÁùºÏ²ÊÂÛ̳ Mathematics) and Professor Andrew Hayward (×î×¼µÄÁùºÏ²ÊÂÛ̳ Epidemiology & Public Health).