China’s Covid-19 vaccine is 50% effective, lower than the 78% originally touted, Brazil results show

13 janvier 2021 Non Par ADMIN

According to an article published on the website on 13 janvier 2021 by ,

Last week, the Brazilian researchers had celebrated results showing 78% efficacy against ‘mild-to-severe’ COVID-19 cases, a rate they later described as ‘clinical efficacy.’

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