Agency chief Catherine Russell, who has completed a visit to the country, called for urgent renewal of the truce between the Government and Houthi rebels.
The landmark agreement was initially announced in April and led to a significant reduction in the intensity of the conflict.
However, a further 62 children have been killed or injured in the period since it ended in early October and 30 November, UNICEF said.
Struggling to survive
Furthermore, at least 74 children were among the 164 people killed or injured by landmines and unexploded ordnance between July and September alone.
Ms. Russell visited a hospital in the city of Aden where she met Yasin, a seven-month-old boy, and his mother, Saba, for whom life has become a struggle for survival.
“Thousands of children have lost their lives, hundreds of thousands more remain at risk of death from preventable disease or starvation,” she said.
“Yasin is just one of too many severely malnourished children in Yemen. They all need immediate support as basic services have all but collapsed.”
Young lives at risk
During her visit, Ms. Russell launched UNICEF’s $10.3 billion Humanitarian Action for Children Appeal to provide water, sanitation, nutrition, education, health and protection services to children worldwide affected by conflict and disasters.
Yemen remains one of the world’s most pressing humanitarian situations. More than 23.4 million people, or three-quarters of the population, require assistance and protection. More than half are children.
UNICEF estimated that 2.2 million youngsters are acutely malnourished, including nearly 540,000 under-fives who are suffering from severe acute malnutrition.
More than 17.8 million Yemenis lack access to safe water, sanitation and hygiene services, while the country’s health system has been extremely fragile for years.
Only half of all health facilities are functional, leaving almost 22 million people – including around 10 million children – without adequate access to care.
Education under fire
The war has caused immunization coverage to stagnate, with 28 per cent of children under a year old missing routine vaccinations.
The situation, together with lack of access to safe water, means children are at extreme risk of diseases such as cholera, measles and diphtheria.
Yemen is also facing a severe education crisis, with tremendous long-term consequences for children, UNICEF warned.
Two million boys and girls currently are out of school, which could rise to six million as at least one out of four schools are destroyed or partially damaged.
Renew the truce
Ms. Russell stressed that if Yemen’s children are to have any chance of a decent future, the warring parties, as well as the international community and those with influence, must ensure they are protected and supported.
“That includes children like Mansour, who I met at a UNICEF-supported rehabilitation and prosthetics centre. His leg was amputated at the knee after he was shot by a sniper. No child should suffer that,” she said.
“The urgent renewal of the truce would be a positive first step that would allow critical humanitarian access. Ultimately, only a sustained peace will allow families to rebuild their shattered lives and begin to plan for the future.”
UNICEF is seeking nearly $484.5 million to respond to the crisis in Yemen throughout 2023, warning that lack of predictable funding puts children’s lives and well-being at risk.
Despite the challenges, the agency was able to carry out interventions this year that included supporting treatment of severe acute malnutrition for more than 260,000 children.
Nearly 1.5 million households received emergency cash transfers every quarter, benefiting roughly nine million people.
UNICEF also provided some 4.7 million Yemenis with access to safe and sustained drinking water via trucking, installation of distribution points and the expansion of water supply systems to camps for internally displaced persons.
Other actions included providing measles and polio vaccination to at least 1.6 million children, and supporting mother, newborn and child health services in 24 hospitals providing operational assistance, as well as equipment and supplies.