Sinovac vaccine shows 50.4% efficacy in test
The Philippine Star|January 14, 2021
SAO PAULO – A coronavirus vaccine developed by China’s Sinovac Biotech was just 50.4 percent effective at preventing symptomatic infections in a Brazilian trial, researchers said on Tuesday, barely enough for regulatory approval and well below the rate announced last week.
Sinovac vaccine shows 50.4% efficacy in test

The latest results are a major disappointment for Brazil, as the Chinese vaccine is one of two that the federal government has lined up to begin immunization during the second wave of the world’s second-deadliest COVID-19 outbreak.

Several scientists and observers blasted the Butantan biomedical center for releasing partial data just days ago that generated unrealistic expectations. The confusion may add to skepticism in Brazil about the Chinese vaccine, which President Jair Bolsonaro has criticized, questioning its “origins.”

“We have a good vaccine. Not the best vaccine in the world. Not the ideal vaccine,” said microbiologist Natalia Pasternak, criticizing Butantan’s triumphant tone.

This story is from the January 14, 2021 edition of The Philippine Star.

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This story is from the January 14, 2021 edition of The Philippine Star.

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