The World Health Organization (WHO) says more than half of hospitals and clinics in Yemen are closed or only partially functioning, warning that the beleaguered Arab country is at a high risk of disease outbreaks due to inadequate health services.

The UN's health agency said in a statement on Monday that its staffers have surveyed 3,507 medical facilities in Yemen and discovered that only 45 percent of them were fully functional and accessible.

The statement added that more than 40 percent of Yemeni districts were suffering from severe shortage of doctors.

While there were only two doctors or less in 42 percent of 276 districts surveyed by the agency, there were none in nearly one-fifth of districts.

“These critical shortages in health services mean that more people are deprived of access to life-saving interventions. Absence of adequate communicable diseases management increases the risk of outbreaks such as cholera, measles, malaria and other endemic diseases,” the WHO stated.

The World Health Organization further noted that Yemeni mothers and their newborn babies lack essential antenatal care and immunization services, adding that people suffering from acute and chronic diseases either have to spend more time on treatment or skip it.

It said Yemen's conflict has affected the lives of more than 21 million Yemenis out of the country's population of 26 million.

Meanwhile, the United Nations International Children's Fund (UNICEF) says 7.4 million Yemeni children are in dire need of medical help, and 370,000 run the risk of severe acute malnutrition.

A Yemeni child cries as he lies on the lap of his mother at a cholera treatment center in Sana’a, Yemen, on October 29, 2016. (Photo by Reuters)

On October 28, World Food Program spokeswoman, Bettina Luescher, urged Yemen’s warring sides to allow access to affected areas, arguing that the Rome-based humanitarian agency felt constrained to provide more food to Yemenis due to a lack of funding and free movement.

“We appeal to the world to help us do our job on the ground; we appeal to the fighting sides that humanitarians can get access to more areas. You know that the situation is complicated, also infrastructure has been damaged, ports have been damaged, [and] it is difficult to get aid in, so any help we can get is highly appreciated,” she said.

Saudi Arabia has been engaged in a deadly campaign against Yemen since March 2015 in an attempt to bring back the former Yemeni government to power and undermine the Houthi Ansarullah movement.

The impoverished Arab country is grappling with the scarcity of food supplies and outbreak of diseases amid Saudi Arabia’s atrocious airstrikes.