" The common cold is one of the most infectious seasonal illnesses known in the United States and beyond. A common cold is the result of a viral infection in the upper respiratory tract from a rhinovirus, which can lead to well-known symptoms such as couching, sneezing, sniffling, fever, nausea, headaches, and others. Nearly 2-3 adults have at least one cold per year, according to the Centers for Disease Control. Even more children are likely to ...