News Snapshot:
Sao Paulo Governor Joao Doria (C), Sao Paulo state Health Secretary Jean Gorinchteyn (L) and Butantan Institute director Dimas Covas (R), pose for photos holding doses of the CoronaVac vaccine against COVID-19 next to a container unloaded from a cargo plane that arrived from China at Guarulhos International Airport in Guarulhos, Sao Paulo state, Brazil, on December 18, 2020. Nelson Almeida | AFP | Getty Images Brazilian researchers said on Wednesday the Covid-19 vaccine developed by China's Sinovac Biotech is more than 50% effective based on trial data, but again withheld full results at the company's request, raising questions about...
