COVID-19 | The Brazilian state of Bahia has signed an agreement to conduct Phase 3 clinical trials for Russia's Sputnik V vaccine against Covid-19 and plans to buy 50 million doses to market in Brazil, officials said on Thursday.

Governor Rui Costa said a confidentiality agreement was signed on Tuesday to undertake the trials and Bahia will receive an initial 500 doses as soon as Brazil's health regulator Anvisa approves the protocol for testing...