Most fruits can be eaten by patients with respiratory tract infections, and usually have no effect on the respiratory tract infection and will not lead to aggravation of respiratory tract infection symptoms, for example, patients can eat apples, pears, bananas, oranges, tangerines and many other fruits. If a patient with respiratory infection has severe diabetes, the amount of fruit eaten should be controlled so as not to cause blood sugar fluctuations, as the vast majority of fruits contain high levels of sugar. Respiratory tract infections are infectious diseases that occur in the respiratory tract, including bacterial infections, fungal infections, and mycoplasma infections. The clinical classification includes upper respiratory tract infection and lower respiratory tract infection. The symptoms are mainly cough, coughing and fever, and there will be sore throat, nasal congestion and runny nose.