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How does AstraZeneca's covid-19 vaccine compare with Pfizer-BioNTech?
ZURICH : Britain on Wednesday became the first country to approve AstraZeneca and Oxford University's home-grown UK COVID-19 vaccine, adding an easy-to-manage shot to the arsenal of a nation desperate for pandemic relief.Even so, scientists - and regulators in Europe, following the Brexit divorce - are sceptical, given confusion over trial results earlier that left experts questioning the robustness of the data.HOW DOES THE ASTRAZENECA SHOT'S EFFICACY STACK UP TO OTHERS'?The AstraZeneca/Oxford vaccine's overall efficacy in preventing symptomatic infections was 70.4%, compared with the 95% efficacy of the shot from Pfizer/BioNTech, the other vaccine approved in Britain.Single-dose efficacy was pegged at 52.7%, Britain said on Wednesday, in