White House national security adviser Jake Sullivan, seen here during a press briefing on Feb. 4, told CBS the World Health Organization has more work to do to get to the bottom of where the coronavirus emerged.

WASHINGTON, DC – FEBRUARY 04: White House Press National Security Advisor Jake Sullivan talks to reporters during the daily press conference in the Brady Press Briefing Room at the White House February 04, 2021 in Washington, DC. Sullivan previewed President Joe Biden’s agenda for his visit to the State Department later in the day. (Photo by Chip Somodevilla/Getty Images)