How does cystic fribros spread?

Cystic fibrosis (CF) is not contagious and does not spread from person to person. It is a genetic disorder caused by mutations in the CFTR gene, which is inherited in an autosomal recessive manner. For a child to be affected by CF, both parents must carry a copy of the mutated gene. Therefore, CF is passed down through families rather than spread through infection or environmental exposure.