Cystic Fibrosis is a genetically inherited disease that primarily affects the lungs and the digestive system. Ireland has the highest incidence of Cystic Fibrosis in the world – approximately 1 in 19 Irish people are said to 'carry' one copy of the altered gene that causes Cystic Fibrosis. Click to read more about CF and the work of Cystic Fibrosis Ireland.