Schoolchildren, wearing protective face masks, discuss during class next to a bottle of disinfectant gel, at the College Jean Renoir Middle School in Boulogne-Billancourt, near Paris, France, January 7, 2022. REUTERS/Yiming Woo 

People shop at Mahmutpasa street, a popular middle-class shopping district, in Istanbul, Turkey January 3, 2022. REUTERS/Murad Sezer 

A tourist shops for clothes at Mahmutpasa street, a popular middle-class shopping district, in Istanbul, Turkey, January 3, 2022. REUTERS/Murad Sezer 

People shop at Mahmutpasa street, a popular middle-class shopping district, in Istanbul, Turkey January 3, 2022. REUTERS/Murad Sezer 

Trainee Riam Abdullah plays the Yemeni traditional lute, or Qanbus, at a music class in Sanaa, Yemen December 20, 2021. Picture taken December 20, 2021. REUTERS/Khaled Abdullah 

Trainees attend a class as they learn how to play the Yemeni traditional lute, or Qanbus, in Sanaa, Yemen, December 20, 2021. Picture taken December 20, 2021. REUTERS/Khaled Abdullah 

Trainees attend a class as they learn how to play the Yemeni traditional lute, or Qanbus, in Sanaa, Yemen December 19, 2021. Picture taken December 19, 2021. REUTERS/Khaled Abdullah 

Trainee Riam Abdullah plays the Yemeni traditional lute, or Qanbus, at a music class in Sanaa, Yemen December 19, 2021. Picture taken December 19, 2021. REUTERS/Khaled Abdullah 

Musician Abdul-Basit al-Harithi plays the Yemeni traditional lute, or Qanbus, at a music class in Sanaa, Yemen, December 19, 2021. Picture taken December 19, 2021. REUTERS/Khaled Abdullah 

Foreign tourists shop at Mahmutpasa street, a popular middle-class shopping area, in Istanbul, Turkey, December 17, 2021. REUTERS/Murad Sezer 

People stroll at Mahmutpasa street, a popular middle-class shopping area, in Istanbul, Turkey, December 17, 2021. REUTERS/Murad Sezer 

U.S. first lady Jill Biden shows ravioli as she visits a culinary arts class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden shows ravioli as she visits a culinary arts class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden puts on an apron as she visits a culinary arts class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden visits a robotics class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden talks to a teacher as she visits a culinary arts class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden visits a robotics class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden puts on an apron during a cooking class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden makes ravioli pasta during a cooking class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden makes ravioli pasta during a cooking class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden visits a robotics class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden visits a robotics class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

U.S. first lady Jill Biden visits a robotics class at Naples Middle High School, in Naples, Italy, November 1, 2021. REUTERS/Ciro De Luca 

Students ride a tuk-tuk to school during their first day of class, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

A man rides a motorcycle with students as they arrive to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

Students wearing protective masks arrive to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

A student wearing a protective mask arrives to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

Students arrive arrive to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

A student wearing a protective face mask looks through the window while arriving to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19), outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

Students wearing protective masks arrive to attend the first day of class at school, following months of closure due to the coronavirus disease (COVID-19) outbreak, in Giza, suburb of Awsim, Egypt October 10, 2021. REUTERS/Shokry Hussien 

Street vendors selling Turkish flags chat in a popular middle-class shopping district in Istanbul, Turkey October 5, 2021. REUTERS/Murad Sezer 

A deaf Palestinian student is reflected in a recycled mirror during a handicraft class ahead of the International Day of Sign Languages, at a school for the deaf in Nablus, in the Israeli-occupied West Bank September 22, 2021. Picture taken September 22, 2021. REUTERS/Raneen Sawafta 

Students attend a class at Mleiha rural school, in Mleiha, Syria, September 14, 2021. Picture taken September 14, 2021. REUTERS/Firas Makdesi 

Students attend a class at Mleiha rural school, in Mleiha, Syria, September 14, 2021. Picture taken September 14, 2021. REUTERS/Firas Makdesi 

Children wearing face masks attend a class as students return to school after the summer break, less than a month into a coronavirus disease (COVID-19) vaccine booster drive, at Arazim Elementary School in Tel Aviv, Israel September 1, 2021. REUTERS/Amir Cohen 

A teacher wearing a face mask conducts a class as students return to school after the summer break, less than a month into a coronavirus disease (COVID-19) vaccine booster drive, at Arazim Elementary School in Tel Aviv, Israel September 1, 2021. REUTERS/Amir Cohen 

Woodrow Wilson Senior High School mascot Seymour and the school cheer team celebrate the return to in-person classes as a mobile vaccination team visits the school, in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Mobile vaccination teams begin visiting every Los Angeles Unified middle and high school campus to deliver first and second doses of the coronavirus disease (COVID-19) vaccines as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Mobile vaccination teams begin visiting every Los Angeles Unified middle and high school campus to deliver first and second doses of the coronavirus disease (COVID-19) vaccines as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

School buses line up outside Woodrow Wilson Senior High School as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

School buses line up outside Woodrow Wilson Senior High School as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Education officials clap after student Edwin Bacaat, a senior at Woodrow Wilson Senior High School, received his COVID-19 vaccination from Registered Nurse Louis Chavez as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Students enter a gymnasium turned onto a mobile coronavirus disease (COVID-19) vaccination center as Los Angeles Unified middle and high school campuses return in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

A sign is seen as a mobile vaccination teams begin visiting every Los Angeles Unified middle and high school campus to deliver first and second doses of the coronavirus disease (COVID-19) vaccines as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Student Stacy Rubio, a Junior at Woodrow Wilson Senior High School, receives a coronavirus disease (COVID-19) vaccine from Registered Nurse Louis Chavez as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Students wait in line at Woodrow Wilson Senior High School as a mobile vaccination team begin administering the coronavirus disease (COVID-19) vaccines as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Student Stacy Rubio, a Junior at Woodrow Wilson Senior High School, holds up her vaccination card for the coronavirus disease (COVID-19) as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Students wait in line at Woodrow Wilson Senior High School as a mobile vaccination team begin administering the coronavirus disease (COVID-19) vaccines as students return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Student Stacy Rubio (C) waits in line at Woodrow Wilson Senior High School as a mobile vaccination team begin administering the coronavirus disease (COVID-19) vaccines for students as they return to in-person classes in Los Angeles, California, U.S., August 30, 2021. REUTERS/Mike Blake 

Saudi students wearing face masks attend a class at a school in Riyadh, Saudi Arabia August 30, 2021. REUTERS/Mohammed Benmansour REFILE - CORRECTING DATE 

Saudi students wearing face masks attend a class at a school in Riyadh, Saudi Arabia August 30, 2021. REUTERS/Mohammed Benmansour REFILE - CORRECTING DATE 

A Saudi teacher wearing a face mask teaches a class at a school in Riyadh, Saudi Arabia August 30, 2021. REUTERS/Mohammed Benmansour REFILE - CORRECTING DATE 

Children attend a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

Children attend a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

A child writes on a fence of a tent as she attends a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

Children attend a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

A child writes on a fence of a tent as he attends a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

A child writes on a fence of a tent as he attends a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

Children attend a class conducted by Muheeb al-Essa, 27, a teacher at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi 

A child writes on a fence of a tent as he attends a class at a camp for internally displaced people in northern Idlib, Syria, June 10, 2021. Picture taken June 10, 2021. REUTERS/Khalil Ashawi