02:29
Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots
Coronavirus: Brazil finds China’s Sinovac vaccine to be less effective than previous data shows
- The new rate is a result of patients who displayed ‘very light’ symptoms being included, says Brazilian research institute that conducted the clinical trials
- New CoronaVac ‘general efficacy’ figure from the Butantan biomedical centre comes after pressure for more transparency amid piecemeal disclosure and delays
02:29
Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots
Corrected [9:08pm, 13 Jan, 2021]
- [9:08pm, 13 Jan, 2021]
An earlier version of this article stated that 3,410 Pfizer-BioNTech vaccine trial participants with Covid-19 symptoms were not tested for Covid-19. It has been corrected to clarify that they tested negative but were not included in the total efficacy rate.
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