Sputnik V: How effective is Russia's Covid jab compared to Oxford, Pfizer and Moderna vaccines - and has UK bought any?
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The world's fight to end the coronavirus pandemic received another boost as Russia's Sputnik V vaccine produced "encouraging" efficacy results from interim trials.
Russia was criticised in some scientific circles last year when it approved the Sputnik V rollout for public use in August before late trials had been completed.
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Hide AdThe Sputnik vaccine has since been administered to more than two million people worldwide and has been approved in more than 15 countries, ahead of interim results being published.