An employee uses an electrocardiogram function on a Fitbit smartwatch at the IFA consumer technology fair, amid the coronavirus disease (COVID-19) outbreak, in Berlin, Germany September 3, 2020. Availability of ECG app pending applicable regulatory clearances including approval under Directive 93/42/EEC (the Medical Device Directive). REUTERS/Michele Tantussi

An employee uses an electrocardiogram function on a Fitbit smartwatch at the IFA consumer technology fair, amid the coronavirus disease (COVID-19) outbreak, in Berlin, Germany September 3, 2020. Availability of ECG app pending applicable regulatory clearances including approval under Directive 93/42/EEC (the Medical Device Directive). REUTERS/Michele Tantussi

The flags of Italy, the European Union and Bari flutter to half mast to honour the country's dead due to coronavirus disease (COVID-19), in Bari, Italy, March 31, 2020. REUTERS/Alessandro Garofalo

Flags fly at half-mast during a ceremony to draw an Italian flag to half mast as mayors across Italy stand in silence to honour the country's dead due to coronavirus disease (COVID-19), in Venice, Italy March 31, 2020. REUTERS/Manuel Silvestri

Flags fly at half-mast during a ceremony to draw an Italian flag to half mast as mayors across Italy stand in silence to honour the country's dead due to coronavirus disease (COVID-19), in Venice, Italy March 31, 2020. REUTERS/Manuel Silvestri

A sign road that reads France is seen near the border line between Spain and France following an order from the Spanish government to set up controls at its land borders over coronavirus disease (COVID-19) in La Jonquera, Spain March 16, 2020. REUTERS/Nacho Doce

A banner with a German flag and a flag of the European Union are pictured during police controls at the border with France, due to the spreading of the coronavirus disease (COVID-19) in Saarbruecken, Germany, March 16, 2020. REUTERS/Ralph Orlowski

A border sign reading "France" is pictured at the border with France in Saarbruecken, Germany, March 16, 2020. REUTERS/Ralph Orlowski

A police officer observes traffic during a coronavirus (COVID-19) check at the border crossing with Italy in Vrtojba, Slovenia, March 11 , 2020. REUTERS/Borut Zivulovic

An EU supporter looks towards the Big Ben clocktower as she demonstrates outside the Houses of Parliament in London, Britain, January 22, 2020. REUTERS/Toby Melville

European Union flags flutter as uncertainty over Brexit continues, in London, Britain April 10, 2019. REUTERS/Gonzalo Fuentes

European Unions flags fly outside the European Commission headquarters in Brussels, Belgium, April 10, 2019. REUTERS/Yves Herman

European Union flags fly outside the European Commission headquarters in Brussels, Belgium, April 10, 2019. REUTERS/Yves Herman

European Union flags fly outside the European Commission headquarters in Brussels, Belgium, April 10, 2019. REUTERS/Yves Herman

A man waves a European flag at a rally held by The People's Vote, calling for another Brexit referendum, ahead of an EU summit, in London, Britain, April 9, 2019. REUTERS/Gonzalo Fuentes

European Union and British flags flutter in front of a chancellery ahead of a visit of British Prime Minister Theresa May in Berlin, Germany, April 9, 2019. REUTERS/Hannibal Hanschke

Small toy figures are seen in front of a Brexit logo in this illustration picture, March 30, 2019. REUTERS/Dado Ruvic/Illustration

Small toy figures are seen in front of a Brexit logo in this illustration picture, March 30, 2019. REUTERS/Dado Ruvic/Illustration

A small toy figure is seen in front of a Brexit logo in this illustration picture, March 30, 2019. REUTERS/Dado Ruvic/Illustration

Pro-Brexit protesters take part in the March to Leave demonstration, in London, Britain March 29, 2019. REUTERS/Toby Melville

EU supporters, calling on the government to give Britons a vote on the final Brexit deal, participate in the 'People's Vote' march in central London, Britain March 23, 2019. REUTERS/Kevin Coombs

An EU supporter, calling on the government to give Britons a vote on the final Brexit deal, participates in the 'People's Vote' march in central London, Britain March 23, 2019. REUTERS/Peter Nicholls

European Union flags fly outside the European Commission headquarters in Brussels, Belgium March 19, 2019 REUTERS/Yves Herman

European Union flags are seen at half-mast in tribute to the victims of the attack in Strasbourg, outside the European Commission headquarters in Brussels, Belgium, December 12, 2018. REUTERS/Francois Lenoir

Pro-Brexit supporters burn an EU flag during a UKIP demonstration in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

Pro-Brexit supporters burn an EU flag during a UKIP demonstration in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

A demonstrator carries a combined flag during an Anti-Tommy Robinson and UKIP rally in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

A demonstrator carries two flags during an Anti-Tommy Robinson and UKIP rally in central London, Britain, December 9, 2018. REUTERS/Dylan Martinez

Protesters participating in an anti-Brexit demonstration march through central London, Britain October 20, 2018. REUTERS/Simon Dawson

A protester wears a beret before an anti-Brexit demonstration, in central London, Britain October 20, 2018. REUTERS/Simon Dawson

A protester wears badges pinned on jeans, before an anti-Brexit demonstration, in central London, Britain October 20, 2018. REUTERS/Simon Dawson

Pro-EU demonstrators wave flags outside the Houses of Parliament in Westminster London, Britain, July 17, 2018. REUTERS/Henry Nicholls TPX IMAGES OF THE DAY

Pro-EU supporters wave flags outside the Houses of Parliament in Westminster, London, Britain, July 4, 2018.REUTERS/Simon Dawson

A padlock stands on a displayed European Union flag in this illustration taken May 23, 2018. REUTERS/Dado Ruvic/Illustration

A padlock stands on a displayed EU flag in this illustration taken May 23, 2018. REUTERS/Dado Ruvic/Illustration

A padlock stands on a displayed EU flag in this illustration taken May 23, 2018. REUTERS/Dado Ruvic/Illustration

Flags of European Union and Poland are seen during an anti-government protest, called 'Freedom March' and organised by opposition parties, in Warsaw, Poland May 12, 2018. REUTERS/Kacper Pempel

The European Union flag flies in the County Kerry village Doora Cross, Ireland, May 5, 2018. REUTERS/Clodagh Kilcoyne

Thailand's Prime Minister Prayuth Chan-ocha arrives for a meeting with Jack Ma, founder of Chinese e-commerce giant Alibaba, in Bangkok, Thailand, April 19, 2018 during the latter's visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, shakes hands with Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, meets Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, gestures during a visit to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme, in Bangkok, Thailand, April 19, 2018. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, arrives for a meeting with Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, arrives for a meeting with Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, shakes hands with Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, gestures as he arrives for a meeting with Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, meets Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, meets Thailand's Prime Minister Prayuth Chan-ocha in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, meets Thailand's Deputy Prime Minister Somkid Jatusripitak in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, smiles as he meets Thailand's Deputy Prime Minister Somkid Jatusripitak in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

Jack Ma, founder of Chinese e-commerce giant Alibaba, meets Thailand's Deputy Prime Minister Somkid Jatusripitak in Bangkok, Thailand, April 19, 2018 during a visit to the country to announce the group's investment in the Thai government's Eastern Economic Corridor (EEC) scheme. REUTERS/Jorge Silva/Pool

A tattered European Flag flies on the seafront in Great Yarmouth, Britain, March 20, 2018. Picture taken March 20, 2018. REUTERS/Hannah McKay

European flag is pictured in Blagnac near Toulouse, France March 21, 2018. REUTERS/Regis Duvignau

Anti Brexit protesters demonstrate outside the Houses of Parliament in London, Britain December 11, 2017. REUTERS/Peter Nicholls

An EU flag and Union flag are seen flying together during an anti-Brexit protest near the Houses of Parliament in London, Britain, December 8, 2017. REUTERS/Toby Melville

An EU flag and Union flag are seen flying together during an anti-Brexit protest near the Houses of Parliament in London, Britain, December 8, 2017. REUTERS/Toby Melville

Fahd Al Rasheed, Group Chief Executive Officer of Emaar the Economic City (EEC), gestures during an interview with Reuters in Riyadh, Saudi Arabia, October 25, 2017. REUTERS/Hamad I Mohammed

Fahd Al Rasheed, Group Chief Executive Officer of Emaar the Economic City (EEC), attends an interview with Reuters in Riyadh, Saudi Arabia, October 25, 2017. REUTERS/Hamad I Mohammed

European Union flags are lowered at half-mast in honor of the victims of the Manchester attack, outside the European Commission headquarters in Brussels, Belgium May 23, 2017. REUTERS/Francois Lenoir

European Union flags are lowered at half-mast in honor of the victims of the Manchester attack, outside the European Commission headquarters in Brussels, Belgium May 23, 2017. REUTERS/Francois Lenoir