The conflict between the Sudanese Armed Forces and the paramilitary Rapid Support Forces erupted in April in 2023.
Nearly 18 million people across Sudan are facing acute hunger, more than double the number at the same time a year ago, according to the WFP.
So far there have been 11 failed attempts at bringing an end to the conflict.
Duol Biem Kueiguong, the director general of the State Ministry of Health, revealed that about 700 children suffering from measles are admitted to Bentiu State Hospital.
More than 6,000 people have entered Ethiopia, fleeing fighting in neighbouring Sudan, according to local officials.
In addition, around 40 Swedish citizens left Sudan on flights operated by other countries, and several others left the country on their own, Mr Kristersson said.
UN secretary general Antonio Guterres has condemned the violence from the power struggle between two generals in Sudan.
