Anthony Fauci (Self), Peter Marks (Self), Albert Bourla (Self - Chairman and CEO of Pfizer), Jon Cohen (Self - Reporter on COVID-19 vaccines), Dan Barouch (Self - Director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center), Glenda Gray (Self - President and CEO of South African Medical Research Council), Tedros Adhanom Ghebreyesus (Self), Kizzmekia Corbett (Self), Adrian Hill (Self), Tedros Adhanom (Self), Adar Poonawalla (Self), Seth Berkley (Self), Paul Abernathy (Self)