Chills. The chills are a sign that the pneumonia infection has permeated into a deep stage of the lungs. They start as the whole body starts to contract the muscle groups with a view to warm up the affected person’s temperature. They are commonly short lived and can subside frequently just by putting the patient in a warm blanket or by using a combination of layers. Possible reasons of this symptom can be the influenza virus as well as the virus of pneumonia, and in a few extra instances, can ultimate longer than standard.