As of the end of March 2022, how many Ukrainian children had to leave their homes?

The United Nations children’s agency, on March 24, 2022, reported that over half of Ukraine’s children, 4.3 million of an estimated 7.5 million, have fled their homes in the first month of the Russian invasion, including about 1.8 million child refugees who have left the country. The total number of refugees who have flooded out of Ukraine stands at 3.7 million, per the tally announced on March 25, 2022, by UNHCR, the U.N. refugee agency.