China’s Covid-19 vaccine is 50% effective, lower than the 78% originally touted, Brazil results show
China’s Covid vaccine was only 50.4 per cent effective at preventing symptomatic infections in a Brazilian trial, researchers have revealed just days after the scientists claimed it was 78 per cent effective against ‘mild to severe’ cases. Sinovac Biotech’s results are barely sufficient for the 50 per cent minimum for regulatory approval and well below the … Read more