Is a Cough a Cold or Flu Symptom?
Both the common cold and the flu are types of upper respiratory infections and both cause coughing. With the common cold, the cough symptom may be productive at first but then turn dry and hacking. Cough is a common symptom of the flu. A cough with the flu tends to be dry and can be severe.
A complication of the flu is pneumonia, which can make people very sick, sometimes requiring hospitalization. If your cough doesn't go away, you cough up yellow-green or bloody mucus (phlegm), you develop a fever over 102 degrees with chills, have shortness of breath or difficulty breathing, call your doctor.
The elderly, young children, people with chronic illness, people with compromised immune systems, and pregnant women are at highest risk of flu complications.