So sorry to hear about this Katie! Is there any reason to suspect that he was laid off because his medical condition (or because he took all of that FMLA leave, etc.) or was it just a downsizing issue? If he was chosen (instead of someone else) to be laid off because of the CF then there may be a legal issue, but if it was just downsizing, there isn't. With laying so many people off I think that it could be difficult to prove that CF was the motivation even if it was--but I don't know the specifics of what happened, etc. If you do think that it was CF related, talk to any attorney in your state.
Sorry to hear about this--hang in there and PM me if you need to chat!
Lisa