Cystic fibrosis (CF) is a genetic condition which causes sticky mucus to build up in the lungs and digestive system. It affects more than 10,800 people in the UK. One in 25 of us carries the faulty gene that causes it, usually without knowing. Cystic fibrosis comes with challenges, affecting our physical health, mental wellbeing and how we choose to live our lives. But our community is uniting towards the ultimate goal of effective treatment for all. Cystic Fibrosis Trust is the charity uniting people to stop cystic fibrosis.