"Don't worry too much. Don't you know your sister? She is such a strong person. They've wandered together for so many years, struggled, and come this far. They won't give up so easily. We should believe in them, shouldn't we? Believe that they will definitely survive with their strong willpower.
You should know his character is very strong, her temperament very stubborn. No one can change the decisions he makes, and his will to live is much stronger than most people's. Now that he's in this condition, he must not be willing to just lie down in bed for the rest of his life. He wants to live freely, to continue life as a normal person.
Right now, there's nothing we can do. The only thing we can do is to believe in them, to have faith that they will survive with their strong will to live.