The Centre for Health Protection (CHP) on Tuesday said three more children are in intensive care with severe flu.

In a statement, the centre said the first case involved a six-year-old boy with good past health. It said his household contacts so far have no symptoms and there was no flu outbreak at his school.

The second involves a 12-year-old boy with an underlying illness. He lives in a school dormitory and seven other students from the same school recently had upper respiratory symptoms.

"The above-mentioned two boys had no travel history during the incubation period. An initial investigation revealed that they did not receive 2024/25 SIV [seasonal influenza vaccine]," a spokesman for the CHP said.

The third case is an eight-year-old boy with good past health. He was diagnosed with flu and another serious infection.

The centre says this brings to eight the number of severe flu cases in children, since the flu season began this month. It said six of the children were unvaccinated against seasonal flu.