Common cold is an ailment that affects the upper respiratory tract of a person i.e. nose and throat. It is basically caused by picornaviruses, including rhinoviruses or coronaviruses. Though a harmless disease, common cold is highly contagious and can spread easily, and rapidly, from one individual to other. On a normal basis, it strikes an adult about three to four times in a year. For the preschoolers, the strike rate is about 6 to 10 times in a year. People, who are struck with common cold, generally get relief from it in about a week's time. There are various reasons for the occurrence of common cold. Read on to know more about its causes and symptoms.
Causes Of Common Cold