Cystic fibrosis is an inherited disease of the mucus and sweat glands. The lungs, pancreas, liver, intestines, sinuses, and sex organs are primarily affected. Treatment options for this condition include antibiotics, exercise, and physical therapy, among other things. Until the 1980s, most deaths from cystic fibrosis occurred in children and teenagers. Due to improved treatments, however, people with the condition now live, on average, to be more than 35 years old.