The U.S. doesn’t need to suspend flights from the U.K. based on a coronavirus mutation that helped prompt an emergency lockdown for London, a member of the White House virus task force said. “I really don’t believe we need to do that yet,” Assistant Secretary for Health Brett Giroir said on ABC’s “This Week” on Sunday. Giroir and Vivek Murthy, President-elect Joe Biden’s pick for surgeon general, both expressed confidence that vaccines developed to fight Covid-19, two of which are already approved for use in the U.S., will be effective against the mutated form of the virus.