From ABC News:

Saudi Arabia recently lifted the blockade on ships and planes delivering humanitarian aid, but the United Nations World Food Programme says that shipments are still few.

From Saturday through today, the Saudi-led coalition, which controls the country’s airspace, allowed two U.N. passenger flights to land each day, WFP’s Yemen country director, Stephen Anderson, told ABC News.

The coalition also let a cargo flight carrying humanitarian aid land on Saturday and another cargo flight with 18 metric tons of medical cargo land today, and a third — with twice as much medical aid — is expected to arrive Tuesday, Anderson said. The World Health Organization said that 1,000 vials of anti-toxins for diphtheria were among today’s shipment.

While humanitarian aid is beginning to enter the country again, the WFP is also concerned about ensuring commercial cargo — particularly food and fuel — gets through, he said. A ship with 5,500 tons of commercial wheat flour arrived on Sunday, and two others with sugar and soy were about to dock, but it is unclear whether the flow would continue unhampered, according to Anderson.

Nearly all of the country’s food is imported, three-quarters of it through Saleef and the nearby port of Hodeidah, according to Anderson.

UN flights to the Yemeni capital resumed on 25 November, bringing vaccines that will immunize 600,000 Yemeni children against preventable diseases. The vaccines arrive at a critical time, when millions of Yemenis are heavily dependent on imports to cover basic needs, following a three-year-long conflict.