In this video, Dr. K K Aggarwal, President Heart Care Foundation of India and Group Editor in Chief MEDtalks, will discuss about the influenza or flu and how to diagnose it. Cough and cold with fever is known as influenza or flu. Cold and cough without fever is an allergic condition. Sore throat with fever and no cold and cough is bacterial sore throat which needs antibiotic management. The simple way to remember flu is no fever no flu.