Mz may have been referring to the fact that CF patients often have chronically infected lungs, and share infections with each other when in close proximity. ht

Mz may have been referring to the fact that CF patients often have chronically infected lungs, and share infections with each other when in close proximity. http://en.wikipedia.org/wiki/Cystic_fibrosis#Chronic_infections http://en.wikipedia.org/wiki/Cystic_fibrosis#Chronic_infecti...