Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

A pupil at Martin-Buber-Oberschule secondary school wear protective mask against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils at Martin-Buber-Oberschule secondary school wear protective masks against the spread of the coronavirus disease (COVID-19) as school resumes following the autumn holidays in Berlin, Germany, October 26, 2020. REUTERS/Annegret Hilse

Pupils of the Freiherr-vom-Stein secondary school in the North Rhine-Westphalian city of Bonn wear protective masks against the spread of COVID-19 following the autumn holidays in Germany, October 26, 2020. REUTERS/Wolfgang Rattay

Pupils of the Freiherr-vom-Stein secondary school in the North Rhine-Westphalian city of Bonn wear winter outfits against the cold as school resumes with open windows and protective masks against the spread of COVID-19 following the autumn holidays in Germany, October 26, 2020. REUTERS/Wolfgang Rattay

Pupils of the Freiherr-vom-Stein secondary school in the North Rhine-Westphalian city of Bonn wear winter outfits against the cold as school resumes with open windows and protective masks against the spread of COVID-19 following the autumn holidays in Germany, October 26, 2020. REUTERS/Wolfgang Rattay

A teacher conducts an online class with pupils receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

A teacher conducts an online class with pupils receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

A teacher conducts an online class with pupils receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

A teacher adjusts her headphones as she conducts an online lesson with pupils receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

A teacher speaks on a phone as she conducts a lesson with a pupil receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

A teacher conducts an online class with pupils receiving distance education inside an empty classroom, as the Czech government shut all schools for two weeks to slow down the spread of the coronavirus disease (COVID-19), at a closed school in Prague, Czech Republic, October 14, 2020. REUTERS/David W Cerny

Patricia, who is pregnant, and Obelson, who got married in a joint ceremony with another pregnant couple who they did not know, to share the costs of the ceremony, pose for a photo outside the church where they got married in Baie de Henne, Nord Ouest Department, Haiti, October 27, 2018. Obelson, who works as a motorcycle driver, met Patricia while working. When she fell pregnant, her parents insisted that they get married. Protestant churchgoing communities in Haiti favour marriage, especially if a couple is expecting a child with some religious schools only accepting pupils if their parents can provide a marriage certificate. REUTERS/Valerie Baeriswyl TPX IMAGES OF THE DAY SEARCH "HAITIAN WEDDINGS BAERISWYL" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES

Teacher Marzio Toniolo took this photo of teachers preparing tests for pupils ahead of the reopening of schools on September 14, where children returned for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Maleo, Italy, September 3, 2020. Picture taken September 3, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo, wearing black gloves, takes a picture as he gives hand sanitiser to one of his primary school pupils, as children return for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Santo Stefano Lodigiano, Italy, September 14, 2020. Picture taken September 14, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo took this photo of a sign outside his school advising pupils and adults to wear masks upon entry, as children returned to school for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Santo Stefano Lodigiano, Italy, September 14, 2020. Picture taken September 14, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo took this photo of the courtyard of his primary school, which has been separated into a different sections for each different class to ensure pupils from each class do not mix together, as part of strict regulations to avoid coronavirus disease (COVID-19) contagion, as children return for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, in Santo Stefano Lodigiano, Italy, September 14, 2020. Picture taken September 14, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo took this photo of a circle on the ground outside his primary school that reads "I wait here", to indicate where pupils from class 4E should stand as they return for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Santo Stefano Lodigiano, Italy, September 14, 2020. Picture taken September 14, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo took this photo of the courtyard of his primary school, which has been separated into a different section for each different class, to ensure that pupils from different classes do not mix as part of strict regulations to avoid coronavirus disease (COVID-19) contagion, ahead of the September 14 reopening when children return for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, in Santo Stefano Lodigiano, Italy, September 10, 2020. Picture taken September 10, 2020. REUTERS/Marzio Toniolo

Teacher Marzio Toniolo took this picture of a pupil at his primary school with a pink mask and textbook on her desk, as children returned for the first time since the end of February when Italy’s original ‘red zone’ towns were put under lockdown, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Santo Stefano Lodigiano, Italy, September 14, 2020. Picture taken September 14, 2020. REUTERS/Marzio Toniolo

Pupils walk in a corridor as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

Pupils, wearing masks against the spread of the new coronavirus, gather at the yard of a primary school during the first day after summer holidays amid the COVID-19 pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A pupil hugs his mother before entering a primary school, during the first day after summer holidays amid the coronavirus disease (COVID-19) pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A teacher explains to pupils how to use masks against the spread of the new coronavirus, at a primary school during the first day after summer holidays amid the COVID-19 pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A teacher explains to pupils how to use masks against the spread of the new coronavirus, at a primary school during the first day after summer holidays amid the COVID-19 pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A pupil wearing a face shield against the spread of the new coronavirus, arrives at a primary school as a teacher waits to take her temperature, during the first day after summer holidays amid the COVID-19 pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

Greece’s Prime Minister Kyriakos Mitsotakis speaks with pupils during his visit at a primary school, on the first day after summer holidays amid the coronavirus disease (COVID-19) pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A pupil takes a selfie with Greece's Prime Minister Kyriakos Mitsotakis, right, and the Education Minister Niki Kerameos during the first day of school after summer holidays amid the coronavirus disease (COVID-19) pandemic in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

Greece’s Prime Minister Kyriakos Mitsotakis speaks with pupils during his visit at a primary school, on the first day after summer holidays amid the coronavirus disease (COVID-19) outbreak, in Athens, Greece, September 14, 2020. Thanassis Stavrakis/Pool via REUTERS

A pupil wears a protective face mask as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

Pupils attend a welcome ceremony as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

A pupil has his hands disinfected as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

A pupil has his temperature checked as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

A pupil has her temperature checked as children return to the Simonetta Salacone primary and secondary school for the first time since March, adhering to strict regulations to avoid coronavirus disease (COVID-19) contagion, in Rome, Italy, September 14, 2020. REUTERS/Remo Casilli

A teacher listens to a pupil on the first week of school after the summer holidays during the coronavirus disease (COVID-19) outbreak, at Larramendi Ikastola in Mungia, Spain, September 8, 2020. REUTERS/Vincent West

A social distancing mark is seen on the floor as pupils arrive on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils have their temperature checked before entering on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils wait in a queue upon arrival on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils wait in a queue upon arrival on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils wearing face masks practice social distancing as they sit in their classroom on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils wearing face masks sit in their classroom on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez ATTENTION EDITORS: SPANISH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN SPAIN

Pupils wearing face masks practice social distancing as they sit in their classroom on the first day of school after summer holidays amid the coronavirus disease (COVID-19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

Pupils wearing face masks practice social distancing as they sit in their classroom on the first day of school after summer holidays amid the coronavirus disease (COVID 19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez ATTENTION EDITORS: SPANISH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN SPAIN

Pupils wait in queue upon arrival on the first day of school after summer holidays amid the coronavirus disease (COVID 19) outbreak, at Mariano Jose de Larra public school in Madrid, Spain, September 8, 2020. REUTERS/Sergio Perez

A teacher wearing a protective mask welcomes a pupil on the first day of school after the summer holidays during the coronavirus disease (COVID 19) outbreak, at Colegio Pureza de Maria school in Bilbao, Spain, September 7, 2020. REUTERS/Vincent West ATTENTION EDITORS: SPANISH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN SPAIN

A teacher wearing a protective mask welcomes a pupil on the first day of school after summer holidays during the coronavirus disease (COVID 19) outbreak, at Colegio Pureza de Maria school in Bilbao, Spain, September 7, 2020. REUTERS/Vincent West ATTENTION EDITORS: SPANISH LAW REQUIRES THAT THE FACES OF MINORS ARE MASKED IN PUBLICATIONS WITHIN SPAIN

Parents and pupils queue to enter a school after the summer holidays during the coronavirus disease (COVID 19) outbreak, at Colegio Pureza de Maria school in Bilbao, Spain, September 7, 2020. REUTERS/Vincent West

A teacher wearing a protective mask welcomes a pupil on the first day of school after the summer holidays during the coronavirus disease (COVID 19) outbreak, at Colegio Pureza de Maria school in Bilbao, Spain, September 7, 2020. REUTERS/Vincent West

A Palestinian teacher sanitises the hands of a student in a classroom as schools reopened gradually amid the coronavirus disease (COVID-19) outbreak, in Susya village in the Israeli-occupied West Bank September 7, 2020. REUTERS/Mussa Qawasma

A Palestinian student has her temperature checked at a school as schools reopen gradually amid the coronavirus disease (COVID-19) outbreak, in Susya village in the Israeli-occupied West Bank September 7, 2020. REUTERS/Mussa Qawasma

Palestinian students exercise at their school as schools reopen gradually amid the coronavirus disease (COVID-19) outbreak, in Susya village in the Israeli-occupied West Bank September 7, 2020. REUTERS/Mussa Qawasma TPX IMAGES OF THE DAY

A Palestinian elementary school student has his hands sanitised as he sits in a classroom after schools reopened gradually amid the coronavirus disease (COVID-19) outbreak, in Susya village in the Israeli-occupied West Bank September 7, 2020. REUTERS/Mussa Qawasma

Palestinian students are seen though a fence as they walk to school with a woman after schools reopened gradually amid the coronavirus disease (COVID-19) outbreak, in Susya village in the Israeli-occupied West Bank September 7, 2020. REUTERS/Mussa Qawasma