People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton TPX IMAGES OF THE DAY

People sit at an outdoor terrace as others walk outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People stand outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People stand outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People walk outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues, in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

People sit at an outdoor terrace outside the Tampa Convention Center a day before the Super Bowl LV between the Kansas City Chiefs and Tampa Bay Buccaneers, as the spread of the coronavirus disease (COVID-19) continues, in Tampa, Florida, February 6, 2021. REUTERS/Shannon Stapleton

A health worker wearing a protective suit takes a swab sample from a security officer at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

A health worker wearing a protective suit labels a sample tube at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

Journalists hold their sample tubes at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

A health worker wearing a protective suit takes a swab sample from a man at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

A health worker wearing a protective suit takes a swab sample from a security officer at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

A health worker wearing a protective suit takes a swab sample from a man at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

A health worker wearing a protective suit takes a swab sample from a man at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam, during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 29, 2021. REUTERS/Kham

Health workers wearing protective suits, are seen at a temporary coronavirus swabbing counter at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

Health workers wearing protective suits, are seen at a temporary coronavirus swabbing counter at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

A Vietnamese soldier, wearing a protective mask, stands with telecom interruption equipment at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

A police officer, wearing a protective mask, holds a riffle in front of a poster with a communist logo at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

Police officers, wearing protective masks, stand guard in front of a communist logo at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

A Vietnamese soldier, wearing a protective mask, stands guard near an image of communist leader Ho Chi Minh at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

Vietnamese soldiers, wearing protective masks, stand guard at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

Vietnamese street security personnel, wearing protective masks, stand guard in front of a communist logo at the National Convention Center, the venue for the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

A police officer, wearing a protective mask, holds a riffle in front of a poster with a communist logo at the National Convention Center, the venue of the 13th National Congress of the Communist Party of Vietnam during the coronavirus disease (COVID-19) outbreak in Hanoi, Vietnam January 28, 2021. REUTERS/Kham

The congress badge with a communist logo is pictured on the chest of a delegate during the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

The congress badge with a communist logo is pictured on the chest of a delegate during the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

A woman walks past a sign with a Vietnamese national flag and a communist flag during the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

The congress badge with a communist logo is pictured on the chest of a delegate during the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

A communist sign is pictured at the National Convention Center, the venue for the 13th national congress of the Communist Party of Vietnam, in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

Delegates go out for lunch during the 13th national congress of the Communist Party of Vietnam at the National Convention Center, in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

A Vietnamese soldier stands guard at the National Convention Center, the venue for the 13th national congress of the Communist Party of Vietnam, in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

Delegates of Bac Ninh province go out for lunch during the 13th national congress of the Communist Party of Vietnam at the National Convention Center, in Hanoi, Vietnam January 27, 2021. REUTERS/Kham

Vietnam's Prime Minister Nguyen Xuan Phuc (C) arrives for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Motorcades stop near the communist sign before the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Motorcade escort delegates arriving for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

A female police officer walks past a communist sign at the National Convention Center, the venue of the 13th national congress of the ruling communist party of Vietnam in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

A police officer directs traffic near a communist sign at the National Convention Center, the venue of the 13th national congress of the ruling communist party of Vietnam in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Delegates arrive for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Delegates arrive for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Female police officers walks past the communist signs and slogans at the National Convention Center, the venue of the 13th national congress of the ruling communist party of Vietnam in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Delegates arrive under a communist flag for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

Security personnel stand guard as delegates arrive for the opening ceremony of the 13th national congress of the ruling communist party of Vietnam at the National Convention Center in Hanoi, Vietnam January 26, 2021. REUTERS/Kham

An attendee receives a nose swab as part of a coronavirus disease (COVID-19) antigen rapid test before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Nasal swab sticks and liquid reagents are pictured at a coronavirus disease (COVID-19) screening station meant for attendees of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees arrive to take a coronavirus disease (COVID-19) antigen rapid test before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

A healthcare worker takes a nose swab for an attendee's coronavirus disease (COVID-19) antigen rapid test before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

A healthcare worker monitors the submission time of an attendee's coronavirus disease (COVID-19) antigen rapid test cartridge at a screening station for attendees of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

An attendee receives a nose swab as part of a coronavirus disease (COVID-19) antigen rapid test before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees wait for their coronavirus disease (COVID-19) antigen rapid test results before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Healthcare workers hold a coronavirus disease (COVID-19) antigen rapid test cartridge at a testing station for attendees of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees' coronavirus disease (COVID-19) antigen rapid test cartridges are time-monitored individually at a screening station for attendees of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees wait for their coronavirus disease (COVID-19) antigen rapid test results before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Ropes divide attendees into groups as part of social distancing measures during a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees arrive for their coronavirus disease (COVID-19) antigen rapid test before a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees sit apart at social distanced tables segregated by ropes, during a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

A social distancing ambassador watches on during a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

General view of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su

Attendees' coronavirus disease (COVID-19) antigen rapid test cartridges are pictured at a screening station for attendees of a conference held by the Institute of Policy Studies at Marina Bay Sands Convention Centre in Singapore January 25, 2021. Picture taken January 25, 2021. REUTERS/Edgar Su