Yes: depending on how much damage has been done. If lungs are scarred, and the tiny air sacs (alveoli) damaged, those things may not heal, but usually significant healing occurs. It is also critical to stop your exposure so that no further damage occurs. If you live with smokers, try to keep them from smoking in the house, or at least have a smoke-free room, smoke eaters elsewhere.Or move if you must.
Answered 11/9/2014
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