More information : Human cough is the most powerful tool for maintaining adequate pulmonary hygiene. Everything else is inferior. However feeble cough due to severe neuromuscular disorders ( myopathhies, lou gehrig's disease) may need adjunct therapies such as vest( vibrating and percussion from a wrap around the chest to keep the mucus moving ). Once again only useful in the above conditions not in normal humans.
Answered 4/5/2013
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