I have an aunt (who is more like a sister than aunt) who has 3 children, (whom I am more of an aunt to than cousin), 2 with Cystic Fibrosis. The 2 with CF have been pretty sick with flu like symptoms. The older of the 2, the daughter, is doing better, but not 100% yet. She is like 19 or 20. The son, who is the youngest (18) is not doing so hot. My mom just called me and told me he is in the hospital with only 23% of his lung capasity. He is hooked up to all kinds of things and is on oxygen. He is very weak. This is very dangerous for those with CF.