Influenza, the "flu," is a highly contagious infection of the respiratory tract that can cause fatigue, muscle aches, fever and chills. The flu IS NOT just a severe cold, but a different infection caused by a different virus.
Flu can be mild or severe depending upon the type of virus, your age and overall health. Flu can affect many body systems, making you feel sick all over.
Sneezing, runny nose, nasal congestion, coughs and sore throat are all symptoms of the common cold. Compare your symptoms to those commonly associated with the cold.
Many infections and illnesses can cause cold symptoms or flu symptoms, but they are not cold or flu. Find out what other respiratory illnesses may be plaguing you.