Unknow time.: No one can answer that question only god knows. The capacity is reduced if that is the fev1. Best option is to quit smoking. Quality of life is also very improtant and also depends if he wishes to quit. You can only help quit and stay off of them. Not make him quit. Thats up to him.
Answered 9/28/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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