The common cold is a viral infection of the upper respiratory tract that usually lasts 7 days. It is caused by a number of viruses like rhinoviruses and parainfluenza viruses. Symptoms include nasal congestion, runny nose, sore throat, cough, and fatigue. While antibiotics are ineffective for treatment, over-the-counter medications can provide relief from symptoms. Good handwashing and covering coughs/sneezes are recommended for prevention. The common cold should be distinguished from influenza, which has a more abrupt onset and causes higher fevers and more severe body aches.