South Korean Unification Minister Lee In-young speaks during a press conference at the Seoul Foreign Correspondents' Club in Seoul, South Korea, February 3, 2021. Ahn Young-joon/ Pool via REUTERS

Reuters' senior correspondent Aislinn Laing leaves a medical facility after receiving a dose of vaccine or placebo for a Johnson & Johnson's COVID-19 vaccine clinical trial in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

Reuters' senior correspondent Aislinn Laing waits after receiving a dose of vaccine or placebo for a Johnson & Johnson's COVID-19 vaccine clinical trial at a medical facility in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

A nurse takes a nasal sample from Reuters senior correspondent Aislinn Laing before she receives a vaccine or placebo dose for Johnson & Johnson's COVID-19 vaccine clinical trial at a medical facility in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

Reuters senior correspondent Aislinn Laing prepares to give a blood sample at a medical facility before receiving a dose of vaccine or placebo of Johnson & Johnson's COVID-19 vaccine clinical trial at Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

Reuters senior correspondent Aislinn Laing waits after receiving a dose of a COVID-19 vaccine or placebo for Johnson & Johnson's clinical trial at a medical facility in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

Reuters senior correspondent Aislinn Laing receives a dose of vaccine or placebo for a Johnson & Johnson's COVID-19 vaccine clinical trial at a medical facility in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

Reuters senior correspondent Aislinn Laing gives a blood sample at a medical facility before receiving a dose of vaccine or placebo of Johnson & Johnson's COVID-19 vaccine clinical trial at Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

A nurse holds a syringe used to shoot a dose of vaccine, or placebo of Johnson & Johnson's clinical trial for a coronavirus disease (COVID-19) vaccine to Reuters senior correspondent Aislinn Laing at a medical facility in Colina area, Santiago, Chile, November 20, 2020. Picture taken November 20, 2020. REUTERS/Ivan Alvarado

The incoming acting U.S. Attorney General Jeff Rosen elbow-bumps Reuters correspondent David Shepardson after his interview at the Justice Department in Washington, U.S., December 16, 2020. REUTERS/Yuri Gripas

White House correspondent Yamiche Alcindor listens as U.S. President-elect Joe Biden responds to her question after Biden spoke about the economy and the final U.S. jobs report of 2020 at his transition headquarters in Wilmington, Delaware, U.S., December 4, 2020. REUTERS/Leah Millis

Argentine soccer legend Diego Maradona smokes a cigar with former Reuters Cuba correspondent Andrew Cawthorne (standing near R) in this undated photograph taken between 2000-2001 in Havana, Cuba. REUTERS/Euridice Bandres

Argentine soccer legend Diego Maradona plays soccer with former Reuters Cuba correspondent Andrew Cawthorne in this undated photograph taken between 2000-2001 in Havana, Cuba. REUTERS/Euridice Bandres

Tokyo Governor Yuriko Koike attends a news conference, amid the coronavirus disease (COVID-19) outbreak, at the Foreign Correspondents' Club of Japan, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike speaks during a news conference behind plastic walls, installed in order to prevent infections following the coronavirus disease (COVID-19) outbreak, at the Foreign Correspondents' Club of Japan, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike, wearing a protective face mask, arrives for a news conference at the Foreign Correspondents' Club of Japan, amid the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike attends a news conference, amid the coronavirus disease (COVID-19) outbreak, at the Foreign Correspondents' Club of Japan, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike is seen during a news conference behind a plastic walls, installed in order to prevent infections following the coronavirus disease (COVID-19) outbreak, at the Foreign Correspondents' Club of Japan, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike takes off her protective face mask during a news conference at the Foreign Correspondents' Club of Japan, amid the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

Tokyo Governor Yuriko Koike, wearing a protective face mask, attends a news conference at the Foreign Correspondents' Club of Japan, amid the coronavirus disease (COVID-19) outbreak, in Tokyo, Japan, November 24, 2020. REUTERS/Issei Kato

CNN National Correspondent Gary Tuchman reports on ballot counting in Atlanta, Georgia, U.S., November 4, 2020. REUTERS/Brandon Bell

CNN National Correspondent Gary Tuchman reports on ballot counting in Atlanta, Georgia, U.S., November 4, 2020. REUTERS/Brandon Bell

Television correspondents and crews work outside the White House on Election Day in Washington, U.S., November 3, 2020. REUTERS/Tom Brenner

Television correspondents and crews work outside the White House on Election Day in Washington, U.S., November 3, 2020. REUTERS/Tom Brenner

A television correspondent reports outside the White House on Election Day in Washington, U.S., November 3, 2020. REUTERS/Tom Brenner

A television correspondent reports outside the White House on Election Day in Washington, U.S., November 3, 2020. REUTERS/Tom Brenner

A television correspondent reports outside the White House on Election Day in Washington, U.S., November 3, 2020. REUTERS/Tom Brenner

U.S. President Donald Trump lashes out at reporters, identifying them as criminals as he responds to a question from Reuters correspondent Jeff Mason about Hunter Biden, son of Democratic presidential nominee Joe Biden, after Trump arrived on campaign travel at Phoenix Sky Harbor International Airport in Phoenix, Arizona, U.S., October 19, 2020. REUTERS/Carlos Barria

Brazil's former President Luiz Inacio Lula da Silva is seen on a screen as he speaks to Reuters from Sao Paulo in a video conference interview conducted by Reuters correspondent Anthony Boadle in Brasilia, Brazil, September 18, 2020. Picture taken September 18, 2020. REUTERS/Adriano Machado

Brazil's former President Luiz Inacio Lula da Silva is seen on a screen as he speaks to Reuters from Sao Paulo in a video conference interview conducted by Reuters correspondent Anthony Boadle in Brasilia, Brazil, September 18, 2020. Picture taken September 18, 2020. REUTERS/Adriano Machado

Brazil's former President Luiz Inacio Lula da Silva is seen on a screen as he speaks to Reuters from Sao Paulo in a video conference interview conducted by Reuters Correspondent Anthony Boadle in Brasilia, Brazil, September 18, 2020. Picture taken September 18, 2020.REUTERS/Adriano Machado

Brazil's former President Luiz Inacio Lula da Silva is seen on a screen as he speaks to Reuters from Sao Paulo in a video conference interview conducted by Reuters Correspondent Anthony Boadle in Brasilia, Brazil, September 18, 2020. Picture taken September 18, 2020.REUTERS/Adriano Machado

La pandémie COVID-19 a mis le concept de vote par correspondance au premier plan des discussions politiques

Reuters U.N. Correspondent Michelle Nichols asks a question of U.S. Secretary of State Mike Pompeo as he speaks to reporters following a meeting with members of the U.N. Security Council about Iran's alleged non-compliance with a nuclear deal and calling for the restoration of sanctions against Iran at U.N. headquarters in New York, U.S., August 20, 2020. REUTERS/Mike Segar/Pool

Reuters U.N. Correspondent Michelle Nichols asks a question of U.S. Secretary of State Mike Pompeo as he speaks to reporters following a meeting with members of the U.N. Security Council about Iran's alleged non-compliance with a nuclear deal and calling for the restoration of sanctions against Iran at U.N. headquarters in New York, U.S., August 20, 2020. REUTERS/Mike Segar/Pool

Headache Stencil, a graffiti artist poses in front of his works during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

Headache Stencil, a graffiti artist poses in front of his works during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

Headache Stencil, a graffiti artist poses in front of his works during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

Headache Stencil, a graffiti artist poses in front of his works during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

A woman takes photo of a painting by a graffiti artist Headache Stencil during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

Headache Stencil, a graffiti artist poses in front of his works during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

Headache Stencil, a graffiti artist signs autographs for a fan during his exhibition at The Foreign Correspondents' Club of Thailand (FCCT) in Bangkok, Thailand, July 31, 2020. Picture taken July 31, 2020. REUTERS/Chalinee Thirasupa

WHO Technical lead head COVID-19 Maria Van Kerkhove attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus arrives at a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus leaves a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

General view during a press conference of the World Health Organization (WHO) organised by the Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Chief Scientist Soumya Swaminathan attends a press conference organised by the Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Chief Scientist Soumya Swaminathan attends a press conference organised by the Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

(From L) World Health Organization (WHO) Health Emergencies Programme head Michael Ryan, WHO Director-General Tedros Adhanom Ghebreyesus and WHO Technical lead head COVID-19 Maria Van Kerkhove attend a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

WHO Health Emergencies Programme head Michael Ryan attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

WHO Technical lead head COVID-19 Maria Van Kerkhove attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

WHO Health Emergencies Programme head Michael Ryan attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

WHO Health Emergencies Programme head Michael Ryan attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva, Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus attends a news conference organized by Geneva Association of United Nations Correspondents (ACANU) amid the COVID-19 outbreak, caused by the novel coronavirus, at the WHO headquarters in Geneva Switzerland July 3, 2020. Fabrice Coffrini/Pool via REUTERS