describe colds and flu as viral diseases
Both the flu and a cold are viral infections and can cause symptoms such as coughing and sore throat. A cold is a minor viral infection of the nose and throat.The flu, however, is usually more severe, with higher fevers and the addition of aches and pains.olds and flu are caused by viruses. Flu is short for influenza.. True flu is a virus that affects your upper respiratory and lower system â your nose, throat, breathing tube, and lungs. Stomach flu is upset stomach and diarrhea caused by a virus in the stomach and intestines.