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

National Institutes of Health Director Francis S. Collins holds a model of SARS-CoV-2, the novel coronavirus, as he testifies on Capitol Hill in Washington, D.C., U.S., July 2, 2020 at a U.S. Senate Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on manufacturing a coronavirus vaccine. Graeme Jennings/Pool via REUTERS??

National Institutes of Health Director Francis S. Collins holds a model of SARS-CoV-2, the novel coronavirus, as he testifies on Capitol Hill in Washington, D.C., U.S., July 2, 2020 at a U.S. Senate Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on manufacturing a coronavirus vaccine. Graeme Jennings/Pool via REUTERS??

National Institutes of Health Director Francis S. Collins holds a model of SARS-CoV-2, the novel coronavirus, as he testifies on Capitol Hill in Washington, D.C., U.S., July 2, 2020 at a U.S. Senate Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on manufacturing a coronavirus vaccine. Graeme Jennings/Pool via REUTERS



National Health Institute Director Francis S. Collins holds a model of SARS-CoV-2, the novel coronavirus, as he testifies on Capitol Hill in Washington, D.C., U.S., July 2, 2020 at a U.S. Senate Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on manufacturing a coronavirus vaccine. Graeme Jennings/Pool via REUTERS??

National Health Institute Director Francis S. Collins holds a model of SARS-CoV-2, the novel coronavirus, as he testifies on Capitol Hill in Washington, D.C., U.S., July 2, 2020 at a U.S. Senate Labor, Health and Human Services, Education and Related Agencies Subcommittee hearing on manufacturing a coronavirus vaccine. Graeme Jennings/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

Fashion designer Anja Gockel reacts as models wear face masks at the catwalk as they present creations of the 2021 summer collection at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model wears a face mask as she presents creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

Models wear face masks as they present creations of the 2021 summer collection by designer Anja Gockel at Adlon Hotel, following the coronavirus disease (COVID-19) outbreak in Berlin, Germany, June 30, 2020. REUTERS/Fabrizio Bensch

A model presents a creation "2033 (teens)" by Belarusian designer Anastasiya Kutepova during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Game" by Belarusian designer Diana Kozharnovich during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Blind Rain" by Belarusian designer Daria Volk during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Game" by Belarusian designer Diana Kozharnovich during a show at festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Models present creations "Bells" by Belarusian designer Svetlana Vorobyeva during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Desert call" by Belarusian designers Alina Loiko and Yuliya Shved during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Malevich" by the Belarusian designer Anton Mazharin during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Models present creations "2033 (teens)" by Belarusian designer Anastasiya Kutepova during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "2033 (teens)" by Belarusian designer Anastasiya Kutepova during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Cry Pangeya" by Belarusian designer Darya Filipenko during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Cry Pangeya" by Belarusian designer Darya Filipenko during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Considerable" by Belarusian designer Kirill Urban during a show at festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Considerable" by Belarusian designer Kirill Urban during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation Malevich by the Belarusian designer Anton Mazharin during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Models present creations "Desert" call by Belarusian designers Alina Loiko and Yuliya Shved during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Models present creations "Game" by Belarusian designer Diana Kozharnovich during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Models present creations "Blind Rain" by Belarusian designer Daria Volk during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation "Blind Rain" by Belarusian designer Daria Volk during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

A model presents a creation Malevich by the Belarusian designer Anton Mazharin during a show at the festival and contest Fashion Mill, amid the coronavirus disease (COVID-19) outbreak, in Minsk, Belarus June 30, 2020. REUTERS/Vasily Fedosenko

Belgian-Congolese influencer and model Vanessa Caixeiro is pictured in a hair salon of the Matonge gallery in Brussels, Belgium, June 13, 2020. Picture taken June 13, 2020. REUTERS/Francois Lenoir

A staff member puts a model cricket player in its place at Bekonscot Model Village to prepare for its reopening, following the coronavirus disease (COVID-19) outbreak, in Beaconsfield, Buckinghamshire, Britain, June 29, 2020. REUTERS/Andrew Boyers

A staff member works at Bekonscot Model Village to prepare for its reopening, following the coronavirus disease (COVID-19) outbreak, in Beaconsfield, Buckinghamshire, Britain, June 29, 2020. REUTERS/Andrew Boyers

A staff member paints an arrow at Bekonscot Model Village to prepare for its reopening, following the coronavirus disease (COVID-19) outbreak, in Beaconsfield, Buckinghamshire, Britain, June 29, 2020. REUTERS/Andrew Boyers

A staff member puts a model horse in its place at Bekonscot Model Village to prepare for its reopening, following the coronavirus disease (COVID-19) outbreak, in Beaconsfield, Buckinghamshire, Britain, June 29, 2020. REUTERS/Andrew Boyers

A staff member works at Bekonscot Model Village to prepare for its reopening, following the coronavirus disease (COVID-19) outbreak, in Beaconsfield, Buckinghamshire, Britain, June 29, 2020. REUTERS/Andrew Boyers