In an recent study, researchers have found that smoking cigarettes can cause effects on your lungs similar to cystic fibrosis. Cystic fibrosis causes a thick sticky mucus to form inside your lungs, which traps bacterias in it where they can become life threatening. Similarly, smoking cigarettes will also form mucus inside the lungs, which could trap bacteria. Cigarette smoke decreases the levels of CFTR in the lungs, which is a protein that keeps the lungs hydrated. This study has shown that treatments used to help cystic fibrosis patients could be used to help smokers as well, but the best way to help a smoker become healthier is to just stop smoking.