N.Y. to Provide Vaccines to Colleges; U.K. Reopens: Virus Update Bloomberg 1 hr ago The weekly death toll from Covid-19 in the U.S. rose for the first time since February and infections climbed for a fourth straight week, even as vaccinations surge. New York City said it has administered more than 5 million doses. A study in Brazil showed that Sinovac Biotech Ltd.’s vaccine is slightly more than 50% effective, raising new concerns over the efficacy of the China’s suite of Covid-19 shots, which are being used in a range of countries as well as domestically. India granted emergency use authorization to Russia’s Sputnik V vaccine, making it the third shot approved for use. The decision came as the country battles a new wave of coronavirus, with a record number of new Covid-19 cases on Monday pushing its overall tally past 13.5 million infections.