Respiratory tract infections are divided into upper respiratory tract infections and lower respiratory tract infections. If the blood routine indicates that the total white blood cell count and neutrophils are high, it is mostly a bacterial infection, and cephalosporin treatment can be given, including cephalosporin I, II, III, IV cephalosporins can treat bacterial infections. If the total white blood cell count and neutrophils are not high or even decreased by routine blood test, it means that the infection is likely to be a viral infection, and cephalosporin is not suitable to be given. Cephalosporin is mainly for bacterial infections, antiviral treatment needs to give oseltamivir antiviral, not indiscriminate use of antibiotics. Respiratory tract infection eating eating cephalosporin and infusion cephalosporin are for bacterial infection, if it is a fungal infection also can not use cephalosporin, need to use voriconazole and other antifungal drug treatment. Mycoplasma infection caused by respiratory tract infection, need to give azithromycin and other macrolide antibiotics to have a better effect, cephalosporin is mainly for bacterial infection effect is better.