Cough for a minute or two, and you may think something has “gone down the wrong pipe.” Cough for a day or two, and you may think you’ve picked up a cold or the flu.After a week, bronchitis or allergies may come to mind. But after three or four weeks, your mind starts to race, and the worry begins to mount.

For more, please click on http://www.health.harvard.edu/staying-healthy/that-nagging-cough?utm_source=delivra&utm_medium=email&utm_campaign=GB20160817-COPD&utm_id=227001&dlv-ga-memberid=11052531&mid=11052531&ml=227001