If you've ever had a cold, there's a good chance it was caused by a rhinovirus. Rhinoviruses (from the Greek word rhin, meaning "nose") are believed to cause an estimated 30 percent to 35 percent of all colds in adults. Symptoms associated with this type of infection include:
Rhinoviruses grow best at temperatures of about 91 degrees Fahrenheit, the temperature inside the human nose. Currently, no remedies are able to kill the virus, so treatment involves relieving symptoms as the body fights the infection.
(Click Rhinovirus for more details on this topic, including a list of ways you can reduce your risk of infection.)