U.S. infectious disease expert Dr. Anthony Fauci informed the WHO on Thursday that the U.S. will not be leaving the organization. Fauci is seen here last month, receiving the Moderna coronavirus vaccine in Washington.

WASHINGTON, USA – DECEMBER 22: US Health and Human Services (HSS) Secretary Alex Azar (not seen) and top infectious disease expert Anthony Fauci receive a coronavirus vaccine from Moderna in Washington, DC, United States on December 22, 2020. The vaccinations were done as part of a National Institutes of Health (NIH) event where Director Francis Collins, Office of Research Services Director Colleen McGowan and health care workers also received the vaccine. (Photo by Chia-Chi Charlie Chang/Pool/Anadolu Agency via Getty Images)