[One week into conflict in Ukraine]
[half a million children are now refugees.]
[The conflict could become one of Europe's largest refugee crises]
[since the Second World War.]
[UNICEF and partners are reaching vulnerable children and families]
[with essential health, education, protection and water services]
[and scaling up its response to meet the urgent needs.]
[of refugee children and families.]
[The only way out of the tragedy unfolding in Ukraine]
[is for the conflict to end.]