A nine-year-old child with recurrent colds and fevers

Repeated respiratory tract infection is the main factor of frequent onset of cold and fever, which is considered to be caused by decreased immunity and lack of trace elements such as zinc and selenium; usually, we should eat more vitamin-rich vegetables and fruits, actively participate in outdoor sports, enhance the immunity of the body, and for children with fever exceeding 38.5 degrees, we also need to go to the Children's Respiratory Department of the hospital for treatment.