Brazil reports more modest 50.4% efficacy for China's Sinovac Covid-19 vaccine

Update of 1/14/2021

The New York Times is now also reporting about it:

Disappointing Chinese Vaccine Results Pose Setback for Developing World Brazil says CoronaVac has an efficacy rate just over 50 percent, much lower than previously announced. More than 380 million doses have already been ordered.

Original Post

How many countries are already using the Chinese Covid-19 vaccine? 

Bahrain and the United Arab Emirates were one of the first countries to approve of a Chinese vaccine, if I am not mistaken (see e.g. here). It appears there are even two different Chinese firms producing a Covid-19 vaccine, i.e. Sinopharm and Sinovac. The Sinopharm vaccine is approved in Bahrain, the Sinovac vaccine in Brazil.

Coronavirus: Brazil finds China’s Sinovac vaccine to be less effective than previous data shows | South China Morning Post 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