The answer is no. Stem cell therapy doesn't work . Think about it ! They take stem cells out of your body and re inject them. Every stem cell has a different area of your body that it is designated for. They can not isolate the ones that just benefit your lungs. Random gathering of t cells without Isolating any of them and re injecting them benefits only the clinics that do the procedure. By using your hard earned money. they gain , but you loose. They are not FDA approved and no doctor in the world backs them unless they are involved in the scam. Four things don't smoke exercise and eat right and stay away from things that can make you sick(flu , colds , and allergens ) .will be your best course. That will be 8000 dollars for my advice , LOL