Covid Vaccine Made by Chinese Company Sinovac Is Said to Be Effective

Sinovac Biotech has sold more than 300 million doses to the developing world, filling a gap left by Western countries. Brazilian officials said Thursday that a coronavirus vaccine made by a Chinese company was effective, bolstering the chances of approval for a second Chinese inoculation that could be rolled out in much of the developing world. Officials in the state of São Paulo, where a prominent medical research institute carried out a large study of the vaccine made by the Beijing-based Sinovac, said the inoculation had an efficacy rate of 78 percent.