World Disappointing Chinese Vaccine Results Pose Setback for Developing World January 13, 2021January 13, 2021Sui-Lee Wee and Ernesto LondoñoComments Off on 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.
