The common flu and seasonal flu are caused by viruses. It is easy to diagnose cold and flu as soon as you notice the symptoms. These both illness can leave you feeling pretty drowsy, cause lung congestion, cough, runny and stuffy nose, sore throat, itchy or watery eyes, headache. The flu is caused by influenza virus and the symptoms are more severe and distinct including body aches, extreme fatigue, vomiting and diarrhea and fever. It is imporant to notify your doctor within 24 hours of noticing the symptoms. Get help to recover as quickly as possible. For more watch the video...