Jessica - Sorry that you are having health problems.
My understanding of the transfer is that it works unofficially--that Disney does not do official transfers and so whoever you transferred your bib to would run as you. You would give that person the waiver forms and they would pick up the bib.
As the person who asked about this, and who would be happy to pay you the cost of your registration in exchange for your bib, I see it as okay so long as the point of the transfer is simply to allow one person to participate in place of another.
Just send me a pm if you decide you want to transfer.