Analysis of China's five Covid-19 vaccines now in the final phase of testing, and plans for global distribution. Kinling Lo speaks with Josephine Ma about vaccines developed by Sinovac, CanSino, Sinopharm and Anhui Zhifei Longcom Biopharmaceutical, comparing their designs and test results in south east Asia and Brazil. Simone McCarthy reports on Xi Jinping's plans for these vaccines to be a 'global public good', which nations are ordering these vaccines, and the logistics needed to inocculate…