During the winter season, it is not uncommon to find yourself coughing. Coughing is a very common illness symptom that is often associated with viral infections such as colds. If you are experiencing a cough, it could be the result of a variety of different illnesses. Although coughing can be a sign of a harmless cold, can a cough indicate a more serious illness like strep throat? Learn about common causes of a cough and ...