While vaccine coverage fell in every world region, the worst effects were seen in East Asia and the Pacific.
Dmitry Muratov sold the medal to raise money for Ukrainian child refugees.
The region is facing one of its worst droughts in four decades and humanitarian assistance has already been sapped by the COVID-19 pandemic and the war in Ukraine.
The urgent vaccination campaign has started in Malawi where drops of the inoculation are being placed in the mouths of children across the country
"Doctors and nurses here, we worry, we cry, but none of us will give up," said "Dr. Iryna."
The devastation could soon worsen with Tropical Depression Grace, which is expected to reach Haiti on Monday night with strong winds and flash flooding.
At the height of lockdowns meant to curb the coronavirus pandemic, nearly 1.5 billion children were affected by school closures, said the U.N. children's agency.
The stars of "Pitch Perfect" recorded the rendition remotely to aid UNICEF.
After five years of war, Yemen’s poor health care infrastructure is unprepared to battle the pandemic.
About 86 million more children could live in poor households by year's end, per an analysis by UNICEF and Save the Children.