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New Brazil data shows disappointing 50.4% efficacy for China’s CoronaVac vaccine – Sydney Morning Herald
It’s the news Indonesian President Joko Widodo probably didn’t want to hear.
“We have a good vaccine. Not the best vaccine in the world. Not the ideal vaccine,” said microbiologist Natalia Pasternak, criticising Butantan’s triumphant tone.
Last week, the Brazilian researchers had celebrated results showing 78 per cent efficacy against “mild-to-severe” COVID-19 cases, a rate they later described as “clinical efficacy”.
They said nothing at the time about another group of “very mild” infections among those who received the vaccine that did not require clinical assistance.
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