Aachen's city carnival enthusiast, Uwe Hahn, wears a carnival medal while celebrating the traditional "Rosenmontag" (Rose Monday) carnival at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiast, Uwe Hahn, serves doughnuts while celebrating the traditional "Rosenmontag" (Rose Monday) carnival at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

A combination picture shows Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit with their dog Patty, as they pose in front of their house with and without their costumes during the traditional "Rosenmontag" (Rose Monday) carnival, in Dallgow-Doeberitz, Germany, February 15, 2021, as celebrations have been cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn kisses his wife Brigit, while celebrating the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, pose without their costumes during the traditional "Rosenmontag" (Rose Monday) carnival at home, in Dallgow-Doeberitz, Germany, February 15, 2021, as celebrations have been cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with an neighbour, while keeping a social distance, next to a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, pose with their costumes as they celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Dog Patty wear a costume done by Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, who prepare to celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Dog Patty wear a costume done by Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, who prepare to celebrate the traditional "Rosenmontag" (Rose Monday) with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic. REUTERS/Fabrizio Bensch

Aachen's city carnival enthusiasts, Uwe Hahn and his wife Brigit, celebrate the traditional "Rosenmontag" (Rose Monday) carnival with a carnival float at home, in Dallgow-Doeberitz, Germany, February 15, 2021, despite celebrations being cancelled due to the coronavirus disease (COVID-19) pandemic . REUTERS/Fabrizio Bensch

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, is pictured next to a historic machine in front of a building of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, holds a copy of his master certificate as he sits on a bench at the campus of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, is pictured next to the logo of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, sits on a bench at the campus of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, poses in front of a stone wall at the campus of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, holds a copy of his master certificate in front of a building of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

Syrian Abdul Kader Tizini who graduated with a master's degree in mechanical engineering from RWTH Aachen, sits on a sign of the university in Aachen, Germany, February 3, 2021. REUTERS/Wolfgang Rattay

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits attend to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A ventilator is seen at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A Medical worker is seen at a desk decorated with Christmas decorations at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

The x-ray image of the lungs of a coronavirus disease (COVID-19) patient are seen at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Various types of medical gloves are seen as medical workers in protective suits attend to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits attend to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits discuss the medical state of a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker puts on his protective equipment before attending to coronavirus disease (COVID-19) patients at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker puts on his protective equipment before attending to coronavirus disease (COVID-19) patients at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits attend to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits discuss the medical state of a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A ventilator is seen next to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

A medical worker in a protective suit attends a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits discuss the medical state of a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits attend to coronavirus disease (COVID-19) patients at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Medical workers in protective suits attend to a coronavirus disease (COVID-19) patient at the intensive care unit (ICU) at the university hospital in Aachen, Germany, December 21, 2020. REUTERS/Leon Kuegeler

Armin Laschet, federal state premier of North Rhine-Westphalia, and his wife Susanne cast their votes for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

Armin Laschet, federal state premier of North Rhine-Westphalia, and his wife Susanne queue for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

Armin Laschet, federal state premier of North Rhine-Westphalia, and his wife Susanne queue for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

Armin Laschet, federal state premier of North Rhine-Westphalia, and his wife Susanne queue for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

Armin Laschet, federal state premier of North Rhine-Westphalia, votes for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

Armin Laschet, federal state premier of North Rhine-Westphalia, casts his vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

People wearing face masks queue to cast their votes for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

People wearing face masks queue to cast their votes for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

A man casts his vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

A man casts his vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

A man casts his vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

A woman casts her vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

People wearing face masks cast their votes for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

People wearing face masks queue to casts their vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen

A woman wearing a face mask casts her vote for the local elections in North Rhine-Westphalia in Aachen, Germany, September 13, 2020. REUTERS/Thilo Schmuelgen