Why does my child still have a low-grade fever after having influenza B for half a month?

A child who still has a low-grade fever half a month after contracting influenza B may be experiencing lingering viral effects, weakened immunity, or a concurrent infection. In this case, parents are advised to take the child to see a doctor for further evaluation to determine the underlying cause and receive appropriate treatment. Meanwhile, ensure the child gets adequate rest and proper nutrition, maintain good indoor ventilation, and avoid contact with other sick individuals to reduce the risk of infection. Follow medical advice closely and actively cooperate with treatment to help the child recover as quickly as possible.