Pneumonia without fever does not mean that the immunity is not good, whether or not the fever is related to the type of infection, the severity of the disease, their own physical and other factors. 1. The type of infection, pneumonia includes bacterial infection, viral infection, mycoplasma and other types, not all types of infections will appear fever, so whether or not the fever is not a standard to determine the strength of immunity. 2. The severity of the disease, if only a small area of pneumonia, and in the early stage of the disease, the overall condition is relatively mild, the general will not appear fever; but if it is a relatively serious condition such as lobar pneumonia, the probability of fever symptoms is greater. 3. Physical condition, some patients may have fever even if the disease is mild, but some patients with severe disease do not have fever, which is related to the physical condition of the individual. Pneumonia patients are advised to consult a doctor in time for active treatment.