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.
A dry, hacking cough may develop toward the end of a cold or after exposure to an irritant, such as dust or smoke. There are many causes of a nonproductive cough, such as: 1  Viral illnesses. 2  After a common cold, a dry cough may last several weeks longer than other symptoms and often gets worse at night. Infections. 2  An infection of the lungs or upper airway passages can cause a cough. 3  A productive cough may be a symptom of pneumonia, bronchitis, sinusitis, or tuberculosis. 4  Chronic lung disease.