16 January 2021 - With case numbers exceedingly low, and the nation poised to roll out the first COVID-19 immunisations in an extraordinary achievement for science, the fact that vaccines had suddenly ­become a bad news story seems in many ways absurd.

But in the blink of an eye, the government’s vaccine strategy was under attack, with scientific institutes locked in debate over the relative merits of the AstraZeneca vaccine and doctors campaigning for more Pfizer.

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