“Influenza (flu) and the common cold are both contagious respiratory illnesses, but they are caused by different viruses. Flu is caused by influenza viruses only, whereas the common cold can be caused by a number of different viruses, including rhinoviruses, parainfluenza, and seasonal coronaviruses.”

Centers for Disease Control and Prevention CDC (https://www.cdc.gov/flu/symptoms/coldflu.htm)