Development of new Covid-19 vaccines is proceeding at a furious pace, which is good news for the world. : Sao Paulo State Governor Joao Doria displays a box of the COVID-19 vaccine produced by the Chinese ... [+] company Sinovac Biotech at the Hospital das Clinicas (HC) in Sao Paulo State, during its trial stage, during a press conference in Sao Paulo, Brazil, on July 21, 2020 amid the novel coronavirus pandemic. - The vaccine trial will be carried out in Brazil in partnership with the Brazilian Research Institute Butanta.