Common cold
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The common cold is probably the most common illness in the world. It is characterized by sneezing, a scratchy throat, a stuffy nose, and coughing. In the course of a year, people in the United States suffer 1 billion colds.
A cold is typically acquired by touching one's eyes or nose after touching surfaces with cold germs on them, or by inhaling the germs. Symptoms usually begin 2 or 3 days after infection and last 2 to 14 days. Colds can be avoided by frequent handwashing and by staying away from infected individuals.
There is currently no cure for the common cold.[1]