Margarita Gomez, nurse of the emergency room of the Quito South Social Security Institute, treats patient suffering from the coronavirus disease (COVID-19), in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

View of the first shot during a gun salute to mark the death of Prince Philip, husband of Queen Elizabeth, at Cardiff Castle, in Cardiff, Wales, Britain April 10, 2021. REUTERS/Rebecca Naden

Patients suffering from the coronavirus disease (COVID-19) receive medical attention in the emergency area of the Quito South Social Security Institute, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

Names of the doctors, nurses and general hospital workers that treated patients suffering from the coronavirus disease, (COVID-19) are displayed in a commemorative plaque at the Quito South Social Security Institute, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

A patients suffering from coronavirus disease (COVID-19) receives medical attention at the Quito South Social Security Institute dinning hall, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

Patients suffering from the coronavirus disease (COVID-19) receive medical attention at the Quito South Social Security Institute dinning hall, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

People bring flowers to Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

Patients suffering from coronavirus disease (COVID-19) receive medical attention at the Quito South Social Security Institute dinning hall, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

Wardens stand at the entrance of Windsor Castle after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Peter Nicholls

Coronavirus disease (COVID-19) patients enter a military tent at the Quito South Social Security Institute parking lot, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

A coronavirus disease (COVID-19) patient enters a military tent at the Quito South Social Security Institute parking lot, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

Coronavirus disease (COVID-19) patients are attended inside a military tent at the Quito South Social Security Institute parking lot, in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

A member of The King's Troop Royal Horse Artillery places empty shells into boxes in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A member of The King's Troop Royal Horse Artillery places empty shells into boxes in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A box of empty shells is prepared for a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A member of The King's Troop Royal Horse Artillery places empty shells into boxes in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A member of The King's Troop Royal Horse Artillery places empty shells into boxes in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Hollie Adams/Pool via REUTERS

Mourners walk near the Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

A member of The King's Troop Royal Horse Artillery carries a box of empty shells in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A member of The King's Troop Royal Horse Artillery carries a box of empty shells in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

A member of The King's Troop Royal Horse Artillery places empty shells into boxes in advance of a gun salute to commemorate the death of Britain's Prince Philip, Duke of Edinburgh, at the Parade Ground, Woolwich Barracks in central London, Britain April 10, 2021. Daniel Leal-Olivas/Pool via REUTERS

Members of the Household Cavalry walk past Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

Members of the Household Cavalry walk past Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

Military tents are seen at the Quito South Social Security Institute parking lot in order to attend the coronavirus disease (COVID-19) patients in Quito, Ecuador April 9, 2021. Picture taken April 9, 2021. REUTERS/Santiago Arcos

A farmer and his son ride a donkey cart after harvesting wheat in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

A family works at harvesting wheat in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

Sons of a farmer work at a wheat field in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

A farmer works at a wheat field in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

Junior soccer players chase the ball in an unexpected snow storm during a match near Altrincham, Britain, April 10, 2021. REUTERS/Phil Noble

A junior soccer player catches snow flakes on his tongue in an unexpected snow storm during a match near Altrincham, Britain, April 10, 2021. REUTERS/Phil Noble

A junior soccer player shields his eyes from an unexpected snow storm during a match near Altrincham, Britain, April 10, 2021. REUTERS/Phil Noble

Tourists visit the Colossi of Memnon (not pictured), the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III, amid the coronavirus disease (COVID-19) pandemic in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

A Union Jack flag flies at half-mast after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

A Union Jack flag flies at half-mast after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

People stand by the village of Al-Qarna near the Colossi of Memnon (not pictured), the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III, amid the coronavirus disease (COVID-19) pandemic in the West Bank of Luxor, Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

Police officers stop a car at a checkpoint during a weekend lockdown to limit the spread of the coronavirus disease (COVID-19), in Mumbai, India, April 10, 2021. REUTERS/Francis Mascarenhas

Players of the Windsor FC Youth Vulcans observe a minutes silence at the beginning of a soccer match, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

A police officer wearing a protective mask against COVID-19 stands near Colossi of Memnon in the West Bank of Luxor, Egypt April 10, 2021. REUTERS/Amr Abdallah Dalsh

Players of the Windsor FC Youth Vulcans and Whiteknights FC Wizards observe a minutes silence at the beginning of a soccer match, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

Players of the Windsor FC Youth Vulcans and Whiteknights FC Wizards observe a minutes silence at the beginning of a soccer match, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

View of Colossi of Memnon, the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III in the West Bank of Luxor, Egypt April 10, 2021. REUTERS/Amr Abdallah Dalsh

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 General view of ground staff preparations ahead of the racing Pool via REUTERS/Scott Heppell

Players of the Windsor FC Youth Vulcans and Whiteknights FC Wizards observe a minutes silence at the beginning of a soccer match, after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in Windsor, near London, Britain, April 10, 2021. REUTERS/Andrew Boyers

Birds gather over the Colossi of Memnon, the ruins of two stone statues that guarded the mortuary temple built for Pharaoh Amenhotep III in the West Bank of Luxor, Egypt April 10, 2021. REUTERS/Amr Abdallah Dalsh

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko TPX IMAGES OF THE DAY

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 9, 2021. Picture taken April 9, 2021. REUTERS/Oleksandr Klymenko

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko

Service members of the Ukrainian armed forces are seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko TPX IMAGES OF THE DAY

A service member of the Ukrainian armed forces is seen at fighting positions on the line of separation from pro-Russian rebels in Donetsk region, Ukraine April 10, 2021. REUTERS/Oleksandr Klymenko

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 General view of preparations ahead of the racing Pool via REUTERS/Scott Heppell

Horse Racing - Grand National Festival - Aintree Racecourse, Liverpool, Britain - April 10, 2021 General view of empty seats ahead of the racing Pool via REUTERS/Scott Heppell

Mourners bring flowers to Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

Mourners bring flowers to Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

AFD co-leader Joerg Meuthen, top candidate for the upcoming general elections, is displayed on a screen at a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

The Wales flag waves at half-mast before a gun salute to mark the death of Prince Philip, husband of Queen Elizabeth, at Cardiff Castle, in Cardiff, Wales, Britain April 10, 2021. REUTERS/Rebecca Naden

A police officer checks a medical certificate of an AFD member at a two-day party congress of the far-right Alternative for Germany (AFD) amid the coronavirus disease (COVID-19) pandemic in Dresden, Germany, April 10, 2021. REUTERS/Matthias Rietschel

A girl brings flowers to Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls

People bring flowers to Buckingham Palace after Britain's Prince Philip, husband of Queen Elizabeth, died at the age of 99, in London, Britain, April 10, 2021. REUTERS/Henry Nicholls