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Scientists worry whether Russia’s ‘Sputnik V’ coronavirus vaccine is safe and effective – CNBC

Scientists and public health officials are skeptical about Russian President Vladimir Putin’s claim that the country’s potential vaccine for the coronavirus “works quite effectively,” saying Tuesday that the vaccine still needs critical testing to determine whether it’s safe and effective. 
Hours earlier, Putin said Russian health officials approved what he said is the first coronavirus vaccine in the world, adding that one of his daughters has already taken it. Clinical trials of the vaccine h…

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