Ricky and Julia have cystic fibrosis and were thus a danger to each other's well-being. It made for powerful drama, but is it based in fact? Small and Marcus suffer from cystic fibrosis, a genetic disease that affects Yet 20 years later she councils young people to keep each other at. Two CF patients in a relationship is a no-no to the medical community. That's because they both carry dangerous bacteria that can kill the other.