Cystic Fibrosis About 75% of all children either carry the Cystic Fibrosis gene or are personally affected by the Cystic Fibrosis gene. Since Cystic Fibrosis is becoming more and more common in children, it is important to truly understand how this genetic disease affects the body and the lives of the people who suffer from it on a daily basis. The defective Cystic Fibrosis (CF) gene is inherited and affects a protein that regulates how much salt moves in and out of cells. The buildup of salt causes mucus to build up on the cell. Usually, mucus in the body are is thin and slippery. When a person has the defective CF gene, then these common substances inside the body are no longer thin and slippery. Instead, these substances become thick and
