Fauci: Trump never asked to slow down testing, 'cautiously optimistic' about vaccine by 2021

Members of the White House COVID-19 task force Anthony Fauci, longtime director of the National Institute of Allergy and Infectious Diseases, and FDA Commissioner Stephen Hahn also promised political pressure would not impact the timeline of vaccine development for the novel coronavirus. Fauci said he is "cautiously optimistic" the U.S. could have a viable vaccine by the end of this year or early next.