A member asked:

Why old people have prolonged cough is it because of low immunity?

A doctor has provided 1 answer

Cough is a protective reflex that helps move moist secretions and debris from deep in the lung to the outlet. Most who have a chronic cough have lung irritation that triggers it. They may or may not have a specific impaired immune response. Immune response does become sluggish with old age, which is why booster vaccines are often given to this age group.

Answered 10/31/2021

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