For the definition of the effective date, it's necessary to go back to the Code of Federal Regulations, Title 42: Public Health, Chapter IV, Centers for Medicare and Medicaid Services (CMS), Department of Health and Human Services, Subchapter G, Standards and Certification; Part 489-Provider Agreements and Supplier Approval; Subpart AâGeneral ...
Report Abuse. A cough is a reflex when we're ill. This is going to sound pretty disgusting but extra mucus is produced during illness to catch any bacteria and stop more of whatever's made you ill from entering your body, and you cough it back up regularly to stop the mucus from entering your lungs and choking you.
Common causes of chronic cough include: 1  Postnasal drip â This is a sensation of mucus trickling from the back of your nose down into your throat. 2  It may be due to hay fever, allergies or irritants. 3  How postnasal drip causes a cough is still not clearly understood. 4  In some cases, this sensation may not even be noticed.