Common cold is an upper respiratory tract infectious disease caused by a different type of viruses. Viruses invade your body and failed it to generate resistance against of all of them. So, it is considered as a frequent illness. The problem of common cold mostly circulates during fall, winter and spring. This is also a communicable disease that can be passed from one person to another in the small drops produced during coughing and sneezing. They can also be spread by hand to hand contact after touching infected noses and eyes. This virus can be present anywhere such as on dusty places on pens, keyboards etc.
