German Health Minister Jens Spahn and head of Robert Koch Institute (RKI) Lothar Wieler leave after a joint news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn leaves after news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn and head of Robert Koch Institute (RKI) Lothar Wieler leave after a joint news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn attends a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn and head of Robert Koch Institute (RKI) Lothar Wieler hold a joint news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

Head of Robert Koch Institute (RKI) Lothar Wieler holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn, head of Robert Koch Institute (RKI) Lothar Wieler and North Rhine-Westphalia's Health Minister Karl-Josef Laumann, hold a joint news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn, head of Robert Koch Institute (RKI) Lothar Wieler and North Rhine-Westphalia's Health Minister Karl-Josef Laumann, hold a joint news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

Head of Robert Koch Institute (RKI) Lothar Wieler holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn holds a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

German Health Minister Jens Spahn arrives for a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

Head of Robert Koch Institute (RKI) Lothar Wieler arrives for a news conference, amid the spread of the coronavirus disease (COVID-19), in Berlin, Germany, March 5, 2021. REUTERS/Annegret Hilse/Pool

Chinese People's Political Consultative Conference (CPPCC) Chairman Wang Yang holds his tea cup next to Chinese President Xi Jinping at the opening session of the National People's Congress (NPC) at the Great Hall of the People in Beijing, China March 5, 2021. REUTERS/Carlos Garcia Rawlins

French Prime Minister Jean Castex and French Health Minister Olivier Veran hold a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex and Health Minister Olivier Veran hold a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran attends a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran speaks as French Prime Minister Jean Castex listens during a news conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex looks on as French Health Minister Olivier Veran speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex listens as French Health Minister Olivier Veran (L) speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran (R) and French Prime Minister Jean Castex give a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex gestures as he speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex gestures as he speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Health Minister Olivier Veran speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

French Prime Minister Jean Castex speaks during a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

View shows an empty speech stand before a press conference on the French government's current strategy for the ongoing coronavirus disease (COVID-19) pandemic, in Paris, France March 4, 2021. Alain Jocard/Pool via REUTERS

National People's Congress (NPC) spokesman Zhang Yesui is seen on screens during a news conference held via video link ahead of the annual parliament meeting in Beijing, China March 4, 2021. REUTERS/Yew Lun Tian

National People's Congress (NPC) spokesman Zhang Yesui is seen on a screen during a news conference held via video link ahead of the annual parliament meeting in Beijing, China March 4, 2021. REUTERS/Yew Lun Tian

National People's Congress (NPC) spokesman Zhang Yesui is seen on screens during a news conference held via video link ahead of the annual parliament meeting in Beijing, China March 4, 2021. REUTERS/Yew Lun Tian

European Commission Vice-President Vera Jourova attends via streaming a joint news conference with the European Commissioner for Equality Helena Dalli, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli gestures as she speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli gestures as she speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

European Commissioner for Equality Helena Dalli speaks during a news conference, in Brussels, Belgium March 4, 2021. REUTERS/Johanna Geron/Pool

Wasim Khan, Chief Executive of the Pakistan Cricket Board (PCB) adjusts protective mask before addressing a press conference, after Pakistan suspended flagship cricket tournament due to coronavirus disease (COVID-19) cases among teams, at the National Stadium in Karachi, Pakistan March 4, 2021. REUTERS/Akhtar Soomro

Wasim Khan, Chief Executive of the Pakistan Cricket Board (PCB) addresses a press conference, after Pakistan suspended flagship cricket tournament due to coronavirus disease (COVID-19) cases among teams, at the National Stadium in Karachi, Pakistan March 4, 2021. REUTERS/Akhtar Soomro