Cystic fibrosis
Cystic fibrosis (CF) is the most common serious genetic condition in the UK, affecting one person in 2500 of North European origin. CF mainly affects the lungs where thick mucus builds up causing repeated infections and breathing difficulties, and the pancreas where blockages cause digestive problems. Although doctors can treat the symptoms of CF, there is no cure at the moment, and the condition is life threatening by the time the patient is 30 years old.