Test subjects a major factor in Sinovac Covid-19 vaccine trial result

A health worker shows a vial of Sinovac's Covid-19 vaccine in the Positivo event center at the Barigui Park in Curitiba, Brazil on Jan 28, 2021. - Reuters

PETALING JAYA: Is the Sinovac Covid-19 vaccine 91.2% effective or 50.3% effective in preventing symptoms of this infectious disease?

Interim results from the Phase Three clinical trial in Turkey show the much higher efficacy, while results from the Phase Three trial in Brazil show the latter.