Pfizer Outlines Booster Plans; Seoul Tightening: Virus Update Bloomberg 29 mins ago Bloomberg News (Bloomberg) -- Pfizer Inc. plans to request U.S. emergency authorization in August for a third booster dose of its Covid-19 vaccine, based on early data showing that it can sharply increase immune protection against the coronavirus. South Korea is tightening curbs on social distancing rules in the greater Seoul area for two weeks starting July 12. Popular Searches Australian Prime Minister Scott Morrison said his government has negotiated with Pfizer Inc. for millions of vaccine doses to be delivered ahead of previous schedules. The Tokyo Olympics will ban spectators from events held in Japan’s capital, revising an earlier decision to allow some fans, as the resurgence of virus cases pushed the government to declare a state of emergency in the city. Most young people face an “extremely low” risk of illness and death from Covid-19 and have no need to shield from the virus, according to researchers behind a large U.K. study.