Responses
I dunno if this answers you, but at the beginning the original Litia said she isn’t gonna die because the disease effects the soul, but now the soul is different. Till her body and soul become one (and she finds all the memories, I guess) she will be experiencing the symptoms. Also, yeah no one knows any of that, so they all think she is gonna die.
Wait, she isn't actually going to die right? Because she already cured it but the symptoms of raphaelis still appears and she hasn't tell anyone yet about it.