Children look out of a school window at people during a procession marking the Christian holiday of Three Kings Day in the Harlem section of Manhattan in New York City, New York, U.S., January 6, 2023. REUTERS/David Dee Delgado 

A child sits in a school bus with a crown prior to the procession for the Christian holiday of Three Kings Day in the Harlem section of Manhattan in New York City, New York, U.S., January 6, 2023. REUTERS/David Dee Delgado 

UNIFIL peacekeepers play with students during the holiday season at a school in Houla, near the border with Israel, southern Lebanon December 22, 2022. REUTERS/Aziz Taher 

A UNIFIL peacekeeper plays with students during the holiday season at a school in Houla, near the border with Israel, southern Lebanon December 22, 2022. REUTERS/Aziz Taher 

A view shows debris in a hallway of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Principal Oksana Kapiika talks with teachers at a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teachers of a bombed-out school make last checks for online classes on computers before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Toys lie among the debris of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teacher Viktoria Poliakova checks a broken door of a classroom of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teacher Viktoria Poliakova stands in a classroom of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Objects lie on the ground among the debris of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teachers of a bombed-out school make last checks for online classes on computers before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teacher Viktoria Poliakova chats with her students, 5th grade student Arina Korchkova and 8th grade students Maksim Sluzhenko and Mykyta Dolganevich at a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Teacher Viktoria Poliakova looks at objects in a classroom of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

An employee cleans the debris of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

A view shows debris in a hallway of a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Broken windows of a bombed-out school are closed by wooden panels before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 31, 2022. REUTERS/Umit Bektas 

Principal Oksana Kapiika talks with a teacher at a bombed-out school before the start of a new school year on September 1, after the summer holidays, with classes being conducted online since Russia launched its military campaign in Mykolaiv, Ukraine, August 22, 2022. REUTERS/Umit Bektas 

Zhao Guorong, 59, shows a photograph of her with her son Zu Wenbao, then aged 10, at Tiananmen Square on a National Day holiday, at their home on the outskirts of Beijing, China August 21, 2022. Zu is one of the 14 million people in China who have autism spectrum disorder, a developmental disability caused by differences in the brain. Despite laws to ensure the integration of people with autism, many in China know little about the disorder and support remains lacking, experts say. REUTERS/Tingshu Wang SEARCH "WANG AUTISM" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A school worker applies hand sanitizer to students' hands as they return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

Children return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

Children return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

Children return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

A school worker applies hand sanitizer to a student's hands as they return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

Children return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

A school worker applies hand sanitizer to students' hands as they return to school after the Christmas holidays as Portugal experiences a surge in coronavirus disease (COVID-19) cases due to the Omicron variant in Lisbon, Portugal, January 10, 2022. REUTERS/Pedro Nunes 

Pupils work in a classroom at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils at The Fulham Boys School take a mock exam on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils at The Fulham Boys School take a mock exam on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils at The Fulham Boys School take a mock exam on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils work in a classroom at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils work in a classroom at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils work in a classroom at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils attend The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils have breakfast at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils stand at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils interact next to lockers at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils sit next to lockers at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

A teacher lays out exams at The Fulham Boys School on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils at The Fulham Boys School return to school on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Pupils at The Fulham Boys School take a mock exam on the first day after the Christmas holidays following a government announcement that face masks are to be worn in English secondary schools amid the coronavirus disease (COVID-19) outbreak in London, Britain, January 4, 2022. REUTERS/Kevin Coombs 

Students leave a school after returning to in-person classes after the holiday break, as the coronavirus disease (COVID-19) pandemic continues in Mexico City, Mexico January 3, 2022. REUTERS/Luis Cortes 

Students leave a school after returning to in-person classes after the holiday break, as the coronavirus disease (COVID-19) pandemic continues in Mexico City, Mexico January 3, 2022. REUTERS/Luis Cortes 

Students leave a school after returning to in-person classes after the holiday break, as the coronavirus disease (COVID-19) pandemic continues, in Mexico City, Mexico January 3, 2022. REUTERS/Luis Cortes 

People wait in line outside Windsor Hills Elementary School to receive nasal swabs at a coronavirus disease (COVID-19) test site operated at Park Hills Community Church during the holiday season as the Omicron variant threatens to increase case numbers in View Park, California, U.S. December 22, 2021. REUTERS/Bing Guan 

The crowd listens on as students perform at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, gets emotional outside with friends after performing for the last time at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, gets emotional during the last performance at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, performs during his last performance at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, performs at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, speaks to the crowd before performing a song at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

An audience member records a song at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, gets emotional during his last performance at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, gets emotional during his last performance at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, performs with peers at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, gets emotional during his last performance at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, plays with his nails in between songs at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Frank Hardy, 18, speaks to the crowd before performing a song at the Holiday Choral Concert put on by Ramon C. Cortines School of Visual and Performing Arts, in Los Angeles, California, U.S., December 10, 2021. Picture taken December 10, 2021. REUTERS/Lauren Justice 

Nikki Nelson, 47, donates blood at Versiti Blood Center of Wisconsin the day after a car plowed through a holiday parade in downtown Waukesha, Wisconsin, U.S., November 22, 2021. Nikki Nelson went to the parade with her daughter and husband to watch her 16-year-old son perform in the high school marching band. "We saw the SUV barreling through the intersection and pick up speed and people were screaming" she said. "We didn't know what to do. It was horrific, we prayed he was ok." After about 20 minutes, she learned her son was unharmed. Her family raced to the high school where they were reunited with him. REUTERS/Cheney Orr