National Disaster Management Office co-ordinator on the island Jioji Satakala confirmed the outbreak was among children.
Satakala said of the 24 cases on the island, 13 children with ages ranging from six months to five years were suffering from malnutrition in Tuatua Village.
He said the island had very limited food sources because most had been destroyed during Severe Tropical Cyclone Winston.
He said the outbreak affected children the most because of the wrong food types being given to them on the island.
