I am the president-elect, but I will not be president until next year," Biden said, underscoring the limitations of his position. "This is truly a national security threat," Dr. Celine Gounder, an infectious diseases specialist, epidemiologist and Biden Transition Covid-19 board member, said on CNN's "Anderson Cooper 360" Friday evening. As the US smashed through another set of coronavirus records on Friday evening, Dr. Vivek Murthy, co-chair of Biden's transition coronavirus advisory board , told Blitzer it was "a grim day for the country." The resurgence in Oregon, where cases topped more than 1,000 a day for the third day in a row Saturday, led Gov. "Our health care system on the Navajo Nation cannot sustain a long-term surge in Covid-19 cases.