http://www.sciencemag.org/news/2021/01/third-time-s-charm-brazil-scales-back-efficacy-claims-covid-10-vaccine-china > A Brazilian man receives the Sinovac COVID-19 vaccine in August 2020 as part of its efficacy trial. > Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.