Philippe Duamelle, UNICEF's representative in Yemen, receives the AstraZeneca vaccine against the coronavirus disease (COVID-19), at a medical center in Aden, Yemen April 20, 2021. REUTERS/Fawaz Salman

British artist Sacha Jafri, who partnered with UNICEF and UNESCO looking to raise up $30 million from selling a painting and donating them to children's charities, stands on the giant canvas at The Atlantis hotel in Dubai, United Arab Emirates, September 20, 2020. Picture taken September 20, 2020. REUTERS/Abdel Hadi Ramadi

A view shows the giant canvas painted by British artist Sacha Jafri, who partnered with UNICEF and UNESCO looking to raise up $30 million from selling the painting and donating them to children's charities, at The Atlantis hotel in Dubai, United Arab Emirates, September 20, 2020. Picture taken September 20, 2020. REUTERS/Abdel Hadi Ramadi

A view shows the giant canvas painted by British artist Sacha Jafri, who partnered with UNICEF and UNESCO looking to raise up $30 million from selling the painting and donating them to children's charities, at The Atlantis hotel in Dubai, United Arab Emirates, September 20, 2020. Picture taken September 20, 2020. REUTERS/Abdel Hadi Ramadi

Children play outisde a UNICEF tent put in place to provide psychosocial support to people affected by a massive explosion in Beirut's port area, Lebanon August 20, 2020. Picture taken August 20, 2020. REUTERS/Mohamed Azakir

Ted Chaiban, UNICEF Regional Director for the Middle East and North Africa, chats with volunteers working inside a house near the site of the massive explosion in Beirut's port area, in Beirut, Lebanon August 17, 2020. REUTERS/Mohamed Azakir

Ted Chaiban, UNICEF Regional Director for the Middle East and North Africa, inspects the damage near the site of a massive explosion in Beirut's port area, Lebanon August 17, 2020. REUTERS/Mohamed Azakir

Ted Chaiban, UNICEF Regional Director for the Middle East and North Africa, inspects damages inside the Karantina Governmental Hospital, in the aftermath of a massive explosion in Beirut's port area, in Beirut, Lebanon August 17, 2020. REUTERS/Mohamed Azakir

Ted Chaiban, UNICEF Regional Director for the Middle East and North Africa, inspects damages inside the Karantina Governmental Hospital, in the aftermath of a massive explosion in Beirut's port area, in Beirut, Lebanon August 17, 2020. REUTERS/Mohamed Azakir

Ted Chaiban, UNICEF Regional Director for the Middle East and North Africa, inspects damages inside the Karantina Governmental Hospital, in the aftermath of a massive explosion in Beirut's port area, in Beirut, Lebanon August 17, 2020. REUTERS/Mohamed Azakir

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn sets off from Wentworth Club to The Celtic Manor on a four-day 210 kilometres charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn sets off from Wentworth Club to The Celtic Manor on a four-day 210 kilometres charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn sets off from Wentworth Club to The Celtic Manor on a four-day 210 kilometres charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn sets off from Wentworth Club to The Celtic Manor on a four-day 210 kilometres charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn holds the Ryder Cup before setting off from Wentworth Club to The Celtic Manor on a four-day 210 kilometre charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn with the Ryder Cup before setting off from Wentworth Club to The Celtic Manor on a four-day 210 kilometre charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn before setting off from Wentworth Club to The Celtic Manor on a four-day 210 kilometre charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn poses with the Ryder Cup before setting off from Wentworth Club to The Celtic Manor on a four-day 210 kilometre charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

Golf - Thomas Bjorn - Wentworth2Wales Unicef Charity Walk - Wentworth Club, Virginia Water, Britain - August 13, 2020 Europe's 2018 Ryder Cup captain Thomas Bjorn poses with the Ryder Cup before setting off from Wentworth Club to The Celtic Manor on a four-day 210 kilometre charity walk to rasie funds for Unicef UK's Save Generation Covid appeal and the Golf Foundation Action Images via Reuters/Paul Childs

A UNICEF worker helps an internally displaced girl put on a face mask at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

Internally displaced children listen to UNICEF campaigners talk about the coronavirus at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

An internally displaced woman helps a girl put on a face mask distributed by UNICEF, at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

A UNICEF worker helps an internally displaced girl put on a face mask at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

A UNICEF worker helps an internally displaced girl put on a face mask at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

A UNICEF worker distributes brochures with medical tips to an internally displaced family at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

UNICEF workers distribute brochures with medical tips to an internally displaced family at a makeshift camp, amid the coronavirus disease (COVID-19) outbreak, in Jalalabad, Afghanistan June 22, 2020. REUTERS/Parwiz

German UNICEF chairman Georg Graf Waldersee looks on during a news conference in Berlin May 5, 2020. Tobias Schwarz/Pool via REUTERS

German Development Minister Gerd Mueller and German UNICEF Chairman Georg Graf Waldersee look towards each other before a news conference in Berlin, Germany May 5, 2020. Tobias Schwarz/Pool via REUTERS

Syrian refugee students take part in a washing hands activity during an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugee students take part in a washing hands activity during an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

A Syrian refugee student takes part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

A Syrian refugee student takes part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

A Syrian refugee student takes part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugees attend a short meeting delivered by an OXFAM member as a part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

A member at OXFAM, teaches Syrian students how to clean their hands as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugee students take part in a washing hands activity during an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugee students take part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugee studentstake part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

A Syrian refugee student takes part in a washing hands activity as part of an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Al Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/ Muhammad Hamed

Syrian refugee students take part in a washing hands activity during an awareness campaign about coronavirus initiated by OXFAM and UNICEF at Zaatari refugee camp in the Jordanian city of Mafraq, near the border with Syria, March 11, 2020. REUTERS/Muhammad Hamed

Dinara Saduakassova, a 23-year-old Kazakh chess player and social activist, poses for a picture in the Chess Academy she founded in Nur-Sultan, Kazakhstan March 3, 2020. Saduakassova has opened a chain of chess schools in the country and has become a Goodwill Ambassador of the UNICEF. Picture taken March 3, 2020. REUTERS/Pavel Mikheyev

Dinara Saduakassova, a 23-year-old Kazakh chess player and social activist, teaches children in the Chess Academy she founded in Nur-Sultan, Kazakhstan March 3, 2020. Saduakassova has opened a chain of chess schools in the country and has become a Goodwill Ambassador of the UNICEF. Picture taken March 3, 2020. REUTERS/Pavel Mikheyev

Dinara Saduakassova, a 23-year-old Kazakh chess player and social activist, teaches children in the Chess Academy she founded in Nur-Sultan, Kazakhstan March 3, 2020. Saduakassova has opened a chain of chess schools in the country and has become a Goodwill Ambassador of the UNICEF. Picture taken March 3, 2020. REUTERS/Pavel Mikheyev

Dinara Saduakassova, a 23-year-old Kazakh chess player and social activist, teaches children in the Chess Academy she founded in Nur-Sultan, Kazakhstan March 3, 2020. Saduakassova has opened a chain of chess schools in the country and has become a Goodwill Ambassador of the UNICEF. Picture taken March 3, 2020. REUTERS/Pavel Mikheyev

Dinara Saduakassova, a 23-year-old Kazakh chess player and social activist, poses for a picture in the Chess Academy she founded in Nur-Sultan, Kazakhstan March 3, 2020. Saduakassova has opened a chain of chess schools in the country and has become a Goodwill Ambassador of the UNICEF. Picture taken March 3, 2020. REUTERS/Pavel Mikheyev

A man with a child play with birds at Martyrs' Square in Tripoli, Libya January 26, 2020. Picture taken January 26, 2020. REUTERS/Ismail Zitouny

A child plays with birds at Martyrs' Square in Tripoli, Libya January 26, 2020. Picture taken January 26, 2020. REUTERS/Ismail Zitouny

Children ride a swing in a garden in Tripoli, Libya January 26, 2020. Picture taken January 26, 2020. REUTERS/Ismail Zitouny

Children ride a swing in a garden in Tripoli, Libya January 26, 2020. Picture taken January 26, 2020. REUTERS/Ismail Zitouny

Libyan students attend a class at a local school in Tripoli, Libya January 28, 2020. Picture taken January 28, 2020 REUTERS/Ismail Zitouny

Libyan students queue before going to the classroom at a local school in Tripoli, Libya January 28, 2020. Picture taken January 28, 2020 REUTERS/Ismail Zitouny

Libyan students walk down the stairs as they leave a classroom at a local school in Tripoli, Libya January 28, 2020. Picture taken January 28, 2020 REUTERS/Ismail Zitouny

Libyan students raise their hand in a class at a local school in Tripoli, Libya January 28, 2020. Picture taken January 28, 2020 REUTERS/Ismail Zitouny

Adelaida Marquez, 25, serves ready-to-use therapeutic food to her 15-month-old son Javier, who has been diagnosed with malnutrition, at the house of her sister-in-law where they are staying whilst receiving medical treatment in Barquisimeto, Venezuela, August 17, 2019. "I was afraid he was going to die," said Marquez. Her son later recovered thanks to ready-to-use therapeutic food, known as RUTF, a packaged food that has been delivered to Venezuela by U.N. children's agency UNICEF. REUTERS/Carlos Garcia Rawlins SEARCH "VENEZUELA MALNUTRITION" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

UNICEF Goodwill Ambassador Millie Bobby Brown poses following an interview after speaking at the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton

UNICEF Goodwill Ambassador Millie Bobby Brown poses following an interview after speaking at the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton

UNICEF Goodwill Ambassador Millie Bobby Brown poses following an interview after speaking at the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton

UNICEF Goodwill Ambassador Millie Bobby Brown speaks during an interview after speaking at the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton

UNICEF Goodwill Ambassador Millie Bobby Brown poses following an interview after speaking at the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton

UNICEF Goodwill Ambassador Millie Bobby Brown speaks during the 30th anniversary of the Convention on the Rights of the Child on World Children's Day at the United Nations headquarters in New York, U.S., November 20, 2019. REUTERS/Shannon Stapleton