Portuguese Secretary of State for European Affairs Ana Paula Zacarias speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

Vials of the Sinovac's vaccine for the coronavirus disease (COVID-19) are seen inside a vaccine carrier at a district health facility in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian medical worker receives a dose of the Sinovac's vaccine for the coronavirus disease (COVID-19) at a district health facility in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

Empty vials of the Sinovac's vaccine are seen inside a dustbin at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19) in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

An Indonesian doctor takes pictures of a vial with the Sinovac's vaccine at a district health facility as Indonesia drives mass vaccination for the coronavirus disease (COVID-19), in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

A mahout walks a tusker along a busy road in Colombo, Sri Lanka January 19, 2021. REUTERS/Dinuka Liyanawatte

A medical worker prepares a dose of the Sinovac's vaccine for the coronavirus disease (COVID-19) before giving it to a doctor at a district health facility in Jakarta, Indonesia January 19, 2021. REUTERS/Willy Kurniawan

Bottles of the Sinovac's vaccine for the coronavirus disease (COVID-19) are seen inside a vaccine carrier at a district health facility in Jakarta, Indonesia, January 19, 2021. REUTERS/Willy Kurniawan

Italian Prime Minister Giuseppe Conte waves as he arrives at the upper house of parliament ahead of a confidence vote in Rome, Italy, January 19, 2021. REUTERS/Yara Nardi

Italian Prime Minister Giuseppe Conte waves as he arrives at the upper house of parliament ahead of a confidence vote in Rome, Italy, January 19, 2021. REUTERS/Yara Nardi

An eruption from Mount Etna lights up the sky during the night, as seen from Zafferana, Italy, January 18, 2021. Picture taken January 18, 2021. REUTERS/Antonio Parrinello

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides speaks during a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

Italian Prime Minister Giuseppe Conte arrives at the upper house of parliament ahead of a confidence vote in Rome, Italy, January 19, 2021. REUTERS/Remo Casilli

Italian Prime Minister Giuseppe Conte arrives at the upper house of parliament ahead of a confidence vote in Rome, Italy, January 19, 2021. REUTERS/Remo Casilli

European Health Commissioner Stella Kyriakides arrives for a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides arrives for a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides arrives for a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

European Health Commissioner Stella Kyriakides arrives for a plenary session on EU global strategy on COVID-19 vaccinations at the EU parliament in Brussels, Belgium January 19, 2021. John Thys/Pool via REUTERS

Italian Justice Minister Alfonso Bonafede gestures as he arrives at the upper house of parliament ahead of a confidence vote for Italian Prime Minister Giuseppe Conte, in Rome, Italy, January 19, 2021. REUTERS/Remo Casilli

Italian Justice Minister Alfonso Bonafede gestures as he arrives at the upper house of parliament ahead of a confidence vote for Italian Prime Minister Giuseppe Conte, in Rome, Italy, January 19, 2021. REUTERS/Remo Casilli

People stand at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

A medical worker prepares to administer a dose of a coronavirus disease (COVID-19) vaccine to a man at a vaccination site, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

A medical worker prepares to administer a dose of a coronavirus disease (COVID-19) vaccine to a man at a vaccination site, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

A medical worker prepares to administer a dose of a coronavirus disease (COVID-19) vaccine to a woman at a vaccination site, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

People sit at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

People sit at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

People stand at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

People sit at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

Italian Foreign Minister Luigi Di Maio waves as he arrives at the upper house of parliament ahead of a confidence vote for Italian Prime Minister Giuseppe Conte, in Rome, Italy, January 19, 2021. REUTERS/Remo Casilli

People stand at a vaccination site after receiving a dose of a coronavirus disease (COVID-19) vaccine, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

A medical worker prepares to administer a dose of a coronavirus disease (COVID-19) vaccine to a man at a vaccination site, during a government-organised visit, following the coronavirus disease (COVID-19) outbreak, in Shanghai, China January 19, 2021. REUTERS/Aly Song

A Palestinian medical worker collects a swab sample from a man to be tested for the coronavirus disease (COVID-19), in the southern Gaza Strip January 14, 2021. Picture taken January 14, 2021. REUTERS/Ibraheem Abu Mustafa

A man takes a dip during celebrations of the Orthodox Christian feast of Epiphany in Almaty, Kazakhstan January 18, 2021. Picture taken January 18, 2021. REUTERS/Pavel Mikheyev

A medical worker collects a swab sample from a woman to be tested for the coronavirus disease (COVID-19), in the southern Gaza Strip January 14, 2021. Picture taken January 14, 2021. REUTERS/Ibraheem Abu Mustafa

Palestinian medical workers walk as they arrive to collect swab samples from people to be tested for the coronavirus disease (COVID-19), in the southern Gaza Strip January 14, 2021. Picture taken January 14, 2021. REUTERS/Ibraheem Abu Mustafa

Palestinian medical workers walk as they arrive to collect swab samples from people to be tested for the coronavirus disease (COVID-19), in the southern Gaza Strip January 14, 2021. Picture taken January 14, 2021. REUTERS/Ibraheem Abu Mustafa

A Palestinian medical worker collects a swab sample from a boy to be tested for the coronavirus disease (COVID-19), in the southern Gaza Strip January 14, 2021. Picture taken January 14, 2021. REUTERS/Ibraheem Abu Mustafa

A health worker participating in a simulation exercise for the coronavirus disease (COVID-19) vaccination activities is pictured surrounded by members of the media, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

A health worker conducts mock vaccination during a simulation exercise for the coronavirus disease (COVID-19) vaccination activities, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

A health worker conducts mock vaccination during a simulation exercise for the coronavirus disease (COVID-19) vaccination activities, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

A health worker looks on during a simulation exercise for the coronavirus disease (COVID-19) vaccination activities, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

Merchants deliver saliva samples for a test at the Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

A health worker checks the blood pressure of a woman during a simulation exercise for the coronavirus disease (COVID-19) vaccination activities, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

Health workers check the temperature and blood pressure of a woman during a simulation exercise for the coronavirus disease (COVID-19) vaccination activities, at the Universidad de Manila, in Manila, Philippines, January 19, 2021. REUTERS/Lisa Marie David

Merchants wait to be tested at the Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

Merchants wait to be tested at the Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

A woman walks past closed shops at the Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

Health workers get ready to collect samples for further testing at Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

A health worker organises samples collected for further testing at Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand, January 19, 2021. REUTERS/Chalinee Thirasupa

Health workers organise samples collected for further testing at Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand January 19, 2021. REUTERS/Chalinee Thirasupa

A woman walks past closed shops at Thanon Mitr Market, amid the spread of the coronavirus disease (COVID-19), in Bangkok, Thailand January 19, 2021. REUTERS/Chalinee Thirasupa

University of the Philippines President Danilo Concepcion speaks before students and activists during a protest following the defense ministry's cancellation of a decades-long pact hindering police and soldiers from the country's state university, University of the Philippines (UP), at University Avenue in Quezon City, Metro Manila, Philippines, January 19, 2021. REUTERS/Eloisa Lopez

An activist holds a placard during a protest following the defense ministry's cancellation of a decades-long pact hindering police and soldiers from the country's state university, University of the Philippines (UP), at the University Avenue in Quezon City, Metro Manila, Philippines, January 19, 2021. REUTERS/Eloisa Lopez

Students and activists stage a protest following the defense ministry's cancellation of a decades-long pact hindering police and soldiers from the country's state university, University of the Philippines (UP), at University Avenue in Quezon City, Metro Manila, Philippines, January 19, 2021. REUTERS/Eloisa Lopez