A view shows the site of a suicide attack in a central market in Baghdad, Iraq January 21, 2021. REUTERS/Thaier al-Sudani

Birds swim near a partially submerged goalpost in a flooded playing field after Storm Christoph arrived in Manchester, Britain January 21, 2021. REUTERS/Phil Noble

A medical specialist is seen at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A view shows wards at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A medical specialist works at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A view shows wards at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A patient receives medical treatment in a ward at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

Tennis player Alexander Bublik of Kazakhstan arrives to a training at Melbourne Park as players undergo mandatory quarantine in advance of the Australian Open in Melbourne, Australia January 21, 2021. REUTERS/Kelly Defina

A view shows the site of a suicide attack in Baghdad, Iraq January 21, 2021. REUTERS/Thaier al-Sudani

Tennis player Alexander Bublik of Kazakhstan arrives to a training at Melbourne Park as players undergo mandatory quarantine in advance of the Australian Open in Melbourne, Australia January 21, 2021. REUTERS/Kelly Defina

A medical specialist works at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A view shows the site of a suicide attack in Baghdad, Iraq January 21, 2021. REUTERS/Thaier al-Sudani

A medical specialist and a patient are seen in a ward at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

Patients follow instructions while practicing Tai Chi at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A view shows wards at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A medical specialist puts a pulse oximeter on a patient's finger to check his blood oxygen level in a ward at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A general view of Melbourne Park as tennis players undergo a mandatory quarantine ahead of the Australian Open in Melbourne, Australia January 21, 2021. REUTERS/Kelly Defina

A view shows wards at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

A patient receives medical treatment in a ward at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

Patients follow instructions while practicing Tai Chi at the Krylatskoye Ice Palace, which was converted into a temporary hospital for people suffering from the coronavirus disease (COVID-19), in Moscow, Russia, January 20, 2021. Picture taken January 20, 2021. REUTERS/Maxim Shemetov

Tennis players and staff undergoing mandatory quarantine ahead of the Australian Open arrive for training in a restricted area at Melbourne Park in Melbourne, Australia January 21, 2021. REUTERS/Kelly Defina

President of Georgia Salome Zourabichvili looks on ahead of a meeting at the European Council in Brussels, Belgium January 21, 2021. Stephanie Lecocq/Pool via REUTERS

A person walks past the entrance to a testing site, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, January 21, 2021. REUTERS/Hannah McKay

A man walks past a testing site sign, amid the coronavirus disease (COVID-19) pandemic, in London, Britain, January 21, 2021. REUTERS/Hannah McKay

A healthcare worker receives a dose of COVISHIELD, a COVID-19 vaccine manufactured by Serum Institute of India, at a school converted into a vaccine centre at Sanand, on the outskirts of Ahmedabad, India January 21, 2021. REUTERS/Amit Dave

Iraqi security forces keep guard the site of a suicide attack in Baghdad, Iraq January 21, 2021. REUTERS/Thaier al-Sudani

A council worker checks the bank of a flooded River Mersey at Didsbury after Storm Christoph arrived in Manchester, Britain, January 21, 2021. REUTERS/Phil Noble

A council worker checks a bridge over a flooded River Mersey at Didsbury after Storm Christoph arrived in Manchester, Britain, January 21, 2021. REUTERS/Phil Noble

A council worker checks the bank of a flooded River Mersey at Didsbury after Storm Christoph arrived in Manchester, Britain, January 21, 2021. REUTERS/Phil Noble

Chinese Foreign Ministry spokeswoman Hua Chunying attends a news conference in Beijing, China January 21, 2021. REUTERS/Carlos Garcia Rawlins

Chinese Foreign Ministry spokeswoman Hua Chunying attends a news conference in Beijing, China January 21, 2021. REUTERS/Carlos Garcia Rawlins

Chinese Foreign Ministry spokeswoman Hua Chunying attends a news conference in Beijing, China January 21, 2021. REUTERS/Carlos Garcia Rawlins

Chinese Foreign Ministry spokeswoman Hua Chunying attends a news conference in Beijing, China January 21, 2021. REUTERS/Carlos Garcia Rawlins

A federal law enforcement officer fires tear gas during a rally to abolish ICE after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

A pickup van carries Oxford-Astrazeneca COVID-19 vaccines, which arrived from India as a gift to Bangladesh, from the Hazrat Shahjalal International Airport to the storage house, in Dhaka, Bangladesh January 21, 2021. REUTERS/Mohammad Ponir Hossain

Workers unload a pickup van that carries Oxford-Astrazeneca COVID-19 vaccines which arrived from India as a gift to Bangladesh, in Dhaka, Bangladesh January 21, 2021. REUTERS/Mohammad Ponir Hossain

A worker carries a package of Oxford-Astrazeneca COVID-19 vaccines that arrived from India as a gift to Bangladesh, in Dhaka, Bangladesh January 21, 2021. REUTERS/Mohammad Ponir Hossain

Workers unload a pickup van that carries Oxford-Astrazeneca COVID-19 vaccines which arrived from India as a gift to Bangladesh, in Dhaka, Bangladesh January 21, 2021. REUTERS/Mohammad Ponir Hossain

Homeland Security officers guard a street corner during a rally to abolish ICE after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

Protesters disperse during a rally to abolish ICE after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

A discarded shield calling for the abolishment of the Portland Police Bureau sits on the ground after federal law enforcement officers used crowd control munitions against protesters rallying to abolish ICE after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

Law enforcement officers are seen during a rally to abolish ICE after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

A protester uses an umbrella and a shield as federal law enforcement officers use crowd control munitions to disperse protesters rallying to abolish ICE, after the inauguration of U.S. President Joe Biden, outside of an ICE facility in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

A nurse helps with treatment of a COVID-19 patient in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Nurses react as they treat a COVID-19 patient in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Federal law enforcement officers guard an ICE facility during a rally to abolish ICE after the inauguration of U.S. President Joe Biden, in Portland, Oregon, U.S. January 20, 2021. REUTERS/Lindsey Wasson

Consultant Anaesthetist Wassim Shamsuddin stands for a portrait in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A nurse treats COVID-19 patients in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Detail is seen of apparatus to assist patient breathing, in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Nurses treat COVID-19 patients in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Nurses treat COVID-19 patients in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A COVID-19 patient receives treatment in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Staff treat a COVID-19 patient in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A nurse passes through a curtain to assist a patient in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A COVID-19 patient receives treatment in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Consultant Anaesthetist Wassim Shamsuddin stands for a portrait in the ICU (Intensive Care Unit) at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

Medical staff work on a COVID-19 ward at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A nurse attends to a patient on a COVID-19 ward at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A message of gratitude is seen on display in a COVID-19 ward at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville

A nurse is reflected in a mirror of a supply room in a COVID-19 ward at Milton Keynes University Hospital, amid the spread of the coronavirus disease (COVID-19) pandemic, Milton Keynes, Britain, January 20, 2021. Picture taken January 20, 2021. REUTERS/Toby Melville