Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots

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

Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots

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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