The Covid-19 vaccine made by Chinese firm Sinopharm’s Wuhan subsidiary has a 72.5 per cent efficacy rate, the company said on Wednesday.The announcement by the Wuhan Institute of Biological Products came after months of phase 3 clinical trials in several countries around the world. It was the first time the company had published such data, though it did not elaborate on the bare figures.Also on Wednesday, Chinese firm CanSino said interim analysis of the results of its final-stage vaccine…



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