Chinese COVID-19 vaccine far less effective than initially claimed in Brazil, sparking concerns : worldnews

Home » World » Chinese COVID-19 vaccine far less effective than initially claimed in Brazil, sparking concerns : worldnews

This is the best tl;dr I could make, original reduced by 86%. (I’m a bot)


A leading Chinese COVID-19 vaccine developed by Sinovac Biotech was just 50.38% effective in late-stage trials in Brazil, significantly lower than earlier results showed, according to a statement published by the government of Sao Paulo Tuesday.

The results suggest Coronavac is less effective than alternative vaccines developed by Pfizer-BioNTech and Moderna, which have an efficacy rate of about 95%. Russia says its Sputnik V vaccine is 91% effective, while the U.K.’s vaccine, developed by Oxford University and AstraZeneca, has an average efficacy of 70%. The Sinovac vaccine is also less effective than its domestic Chinese competitor, developed by the state-owned Sinopharm, which it says is 79.34% effective.

China has inoculated tens of thousands of people with Sinovac’s vaccine since July under a government-approved emergency use program, which includes at least three Chinese vaccine candidates.


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