How likely is it that she will pull through? Details inside.

I found out that a good friend of mine from high school is very ill. We lost touch after graduation a bit but check up on each other every now and then. She has cystic fibrosis and every year around this time she ends up in the hospital with a lung infection of some sort. Last week she was admitted – Her oxygen stats had plummeted. They have had to keep her sedated and she is intubated. They are aggressively treating with antibiotics right now. She has been unresponsive all week. This is the worst it’s ever been. She is 22. I feel terrible but I’m starting to think this may be the end… can anyone shed some light on this? Also, what would you do in my situation? Should I try to visit her, or send something?