A man and a child escape from the town of Irpin, after heavy shelling on the only escape route used by locals, while Russian troops advance towards the capital of Kyiv, in Irpin, near Kyiv, Ukraine March 6, 2022. REUTERS/Carlos Barria 

A child looks out from a tent at the temporary accommodation and transport hub for refugees at a former shopping mall, after fleeing the Russian invasion of Ukraine, in Przemysl, Poland, March 6, 2022. REUTERS/Yara Nardi TPX IMAGES OF THE DAY 

Children look out from an evacuation train from Kyiv to Lviv as they say goodbye to their father at Kyiv central train station in central Kyiv, Ukraine March 3, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Children patients whose treatments are underway stay in their beds moved to the hallways of basement floors of Okhmadet Children's Hospital, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine February 28, 2022. REUTERS/Umit Bektas 

A boy, who came with the humanitarian transport of children from Ukrainian public orphanages following the Russian invasion of Ukraine, reacts as he has breakfast at the Hotel Ossa near Rawa Mazowiecka, Poland March 5, 2022. Picture taken March 5, 2022. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY 

Children's toys are seen on a mattress in a hotel operating as a short term shelter for people fleeing from Ukraine to Romania, following Russia's invasion of Ukraine, at the border crossing in Siret, Romania, March 6, 2022. REUTERS/Clodagh Kilcoyne 

A woman fleeing Russian invasion of Ukraine hugs a child at a temporary camp in Przemysl, Poland, February 28, 2022. REUTERS/Yara Nardi TPX IMAGES OF THE DAY 

A refugee child fleeing from Ukraine gestures when waiting for transport at Nyugati station, after Russia launched a massive military operation against Ukraine, in Budapest, Hungary, February 28, 2022. REUTERS/Marton Monus TPX IMAGES OF THE DAY 

Children, who came with the humanitarian transport of children from Ukrainian public orphanages following the Russian invasion of Ukraine, have breakfast at the Hotel Ossa near Rawa Mazowiecka, Poland March 5, 2022. Picture taken March 5, 2022. REUTERS/Kacper Pempel 

Children take shelter in the basement of a perinatal centre as air raid siren sounds are heard amid Russia's invasion of Ukraine, in Kyiv, Ukraine, March 2, 2022. REUTERS/Valentyn Ogirenko 

People with their newborn children take shelter in the basement of a perinatal centre as air raid siren sounds are heard amid Russia's invasion of Ukraine, in Kyiv, Ukraine, March 2, 2022. REUTERS/Valentyn Ogirenko 

A child carries fruit juices and snacks at the temporary accommodation and transport hub for refugees at a former shopping mall, after fleeing the Russian invasion of Ukraine, in Przemysl, Poland, March 6, 2022. REUTERS/Yara Nardi 

Children wearing foil blankets fleeing the Russian invasion of Ukraine cross the border from Ukraine to Poland at the border checkpoint in Medyka, Poland, March 7, 2022. REUTERS/Fabrizio Bensch 

A woman embraces a child who arrived from the Alumim orphanage in Zhytomyr, Ukraine, at a temporary accommodation, following the Russian invasion of Ukraine, at the Nes Harim Field and Forest Education Center near Jerusalem, March 6, 2022. REUTERS/Ronen Zvulun 

Children, who came with the humanitarian transport of children from Ukrainian public orphanages following the Russian invasion of Ukraine, are seen at the Hotel Ossa near Rawa Mazowiecka, Poland March 5, 2022. Picture taken March 5, 2022. REUTERS/Kacper Pempel 

Varvara, 2 years old, who came with the humanitarian transport of children from Ukrainian public orphanages following the Russian invasion of Ukraine, looks on as she eats breakfast at the Hotel Ossa near Rawa Mazowiecka, Poland March 5, 2022. Picture taken March 5, 2022. REUTERS/Kacper Pempel 

A group of children evacuated from an orphanage in Zaporizhzhia wait to board a bus for their transfer to Poland after fleeing the ongoing Russian invasion at the main train station in Lviv, Ukraine, March 5, 2022. REUTERS/Kai Pfaffenbach REFILE - CORRECTING INFORMATION 

A child fleeing Russian invasion of Ukraine reacts as she stands outside the tent, at a temporary camp in Przemysl, Poland, March 1, 2022. REUTERS/Yara Nardi 

Children looking out of a train window waiting for the departure to Poland following Russia?s invasion of Ukraine at the main train station in Lviv, Ukraine, March 4, 2022. REUTERS/Kai Pfaffenbach 

Children patients whose treatments are underway stay in their beds moved to the hallways of the basement floor of Okhmadet Children's Hospital, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine February 28, 2022. REUTERS/Umit Bektas 

A man with his newborn child takes shelter in the basement of a perinatal centre as air raid siren sounds are heard amid Russia's invasion of Ukraine, in Kyiv, Ukraine, March 2, 2022. REUTERS/Valentyn Ogirenko 

Children patients whose treatments are underway, parents and medical staff stay in one of the shelters of Okhmadet Children's Hospital, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine February 28, 2022. REUTERS/Umit Bektas 

A child eats a cookie as she stands in a temporary accommodation for refugees at the train station, after fleeing Russian invasion of Ukraine, in Przemysl, Poland, March 7, 2022. REUTERS/Yara Nardi