A mother and her son sleep in a family zone in Lviv, Ukraine while waiting to board a train to Poland on March 12. Photo: Dan Kitwood/VCG

A mother nurses her crying child after a residential building was hit by debris from a downed rocket in Kyiv, Ukraine on March 20. Photo: Fadel Senna/VCG

A woman kisses her child as Russian soldiers look on in Mariupol, Ukraine on April 12. Photo: Alexander Nemenov/VCG

A mother hugs her daughter as they wait for a bus to flee from Sloviansk, Ukraine on April 16. Photo: Petros Giannakouris/VCG

A woman carrying her child boards a train to Poland’s capital Warsaw in Przemysl, near the Polish-Ukrainian border, on March 22. Photo: Angelos Tzortzinis/VCG

One-year-old Vlad with his mother Natasha inside an indoor sports stadium used as a refugee center on March 15 in the village of Medyka, a border crossing between Poland and Ukraine. Photo: Petros Giannakouris/VCG

A woman watches a video with her son in a temporary shelter in a gym at a high school in Przemysl on March 15. Photo: Louisa Gouliamaki/VCG

A Ukrainian mother and her daughter who are seeking asylum in the U.S. wait to cross the U.S.-Mexico border at the San Ysidro Port of Entry on April 5 in Tijuana, Mexico. Photo: Mario Tama/VCG

Nadia Stasishin sits with her son, Yura Stasishin, as he rests after being treated in an Israeli field hospital for an epileptic seizure on March 30 in Mostyska, Ukraine during the war. Mostyska lies between Lviv and the Polish border, a primary route for people fleeing Ukraine. Photo: Joe Raedle/VCG

Vova, 10, waits at the morgue before the funeral of his mother, Maryna, in Bucha, on the outskirts of Kyiv, Ukraine, on April 20. His mother died while they sheltered in a basement for more than a month during the war. Photo: Emilio Morenatti/VCG