U.S. President Donald Trump walks down the West Wing colonnade from the Oval Office to the Rose Garden to deliver an update on the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump pauses as he speaks about the "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, during an event in the Rose Garden of the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria TPX IMAGES OF THE DAY 

U.S. President Donald Trump pauses as he speaks about the "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, during an event in the Rose Garden of the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump listens while delivering an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump walks down the West Wing colonnade from the Oval Office to the Rose Garden to deliver an update on the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump speaks about the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, during an event in the Rose Garden of the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump walks down the West Wing colonnade from the Oval Office to the Rose Garden to deliver an update on the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump walks down the West Wing colonnade from the Oval Office to the Rose Garden to deliver an update on the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump speaks about the "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, during an event in the Rose Garden of the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump speaks about the "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, during an event in the Rose Garden of the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump delivers an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump walks down the West Wing colonnade to the Rose Garden to deliver an update on the so-called "Operation Warp Speed" program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. President Donald Trump arrives to deliver an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in an address from the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

Assistant Health and Human Services (HHS) Secretary Brett Giroir is seated prior to U.S. President Donald Trump delivering an update on the so-called Operation Warp Speed program, the joint Defense Department and HHS initiative that has struck deals with several drugmakers in an effort to help speed up the search for effective treatments for the ongoing coronavirus disease (COVID-19) pandemic, in the Rose Garden at the White House in Washington, U.S., November 13, 2020. REUTERS/Carlos Barria 

U.S. Army Gen. Gustave F. Perna, who will reportedly co-lead an administration effort dubbed "Operation Warp Speed" to find a vaccine for the coronavirus disease (COVID-19), listens as U.S. President Donald Trump speaks to reporters during a news conference in the Brady Press Briefing Room at the White House in Washington, U.S., September 18, 2020. REUTERS/Kevin Lamarque 

U.S. President Donald Trump turns to U.S. Army Gen. Gustave F. Perna, who will co-lead an administration effort dubbed "Operation Warp Speed" to find a vaccine for the coronavirus disease (COVID-19), as he speaks to reporters during a news conference in the Brady Press Briefing Room at the White House in Washington, U.S., September 18, 2020. REUTERS/Kevin Lamarque 

U.S. Senator Richard Shelby (R-AL) and Senator Lamar Alexander (R-TN) speak at a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

U.S. Senator Roy Blunt (R-MO) speaks with Senator Jeanne Shaheen (D-NH) at a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

U.S. Senator Roy Blunt (R-MO) and Senator Lamar Alexander (R-TN) speak with NIH Director Dr Francis Collins after he testified at a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

U.S. Senator Richard Shelby (R-AL) attends a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

U.S. Senator Roy Blunt (R-MO) speaks during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

CDC Dirctor Dr Robert Redfield testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

NIH Director Dr Francis Collins and CDC Director Dr Robert Redfield testify during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

NIH Director Dr Francis Collins and CDC Director Dr Robert Redfield testify during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

NIH Director Dr Francis Collins and CDC Director Dr Robert Redfield testify during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

NIH Director Dr Francis Collins and CDC Director Dr Robert Redfield testify during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

NIH Director Dr Francis Collins and CDC Director Dr Robert Redfield testify during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Director of National Institutes of Health (NIH) Dr Francis Collins testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Biomedical Advanced Research and Development Authority (BARDA) Acting Director Gary Disbrow testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Biomedical Advanced Research and Development Authority (BARDA) Acting Director Gary Disbrow testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Biomedical Advanced Research and Development Authority (BARDA) Acting Director Gary Disbrow testifies during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Director of National Institutes of Health (NIH) Dr Francis Collins holds up a model of SARS-CoV-2, the novel coronavirus, during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Director of National Institutes of Health (NIH) Dr Francis Collins holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations Subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Robert Redfield, Director of the Centers for Disease Control and Prevention (CDC), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), adjusts his mask as he testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds his mask as he testifies during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations Subcommittee Hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

Dr Francis Collins, Director of the National Institutes of Health (NIH), holds up a model of SARS-CoV-2, known as the novel coronavirus, during a U.S. Senate Appropriations subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

A model of SARS-CoV-2, known as the novel coronavirus, is seen ahead of testimony from Dr Francis Collins, Director of the National Institutes of Health (NIH), during a U.S. Senate Appropriations subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as Operation Warp Speed on Capitol Hill in Washington, D.C, U.S., July 2, 2020. Saul Loeb/Pool via REUTERS 

A model of SARS-CoV-2, known as the novel coronavirus, is seen ahead of a U.S. Senate Appropriations subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as "Operation Warp Speed", on Capitol Hill in Washington, D.C, U.S, July 2, 2020. Saul Loeb/Pool via REUTERS 

A model of SARS-CoV-2, known as the novel coronavirus, is seen ahead of a U.S. Senate Appropriations subcommittee hearing on the plan to research, manufacture and distribute a coronavirus vaccine, known as "Operation Warp Speed", on Capitol Hill in Washington, D.C, U.S, July 2, 2020. Saul Loeb/Pool via REUTERS 

U.S. Army General Gustave Perna testifies before the Senate Armed Services Committee during his confirmation hearing to co-lead Operation Warp Speed, an effort to find a vaccine for the coronavirus disease (COVID-19), in the Dirksen Senate Office Building on Capitol Hill, in Washington, U.S. June 18, 2020. Chip Somodevilla/Pool via REUTERS