You are one of her regular youngsters patients. As of, you are ill with leukaemia. Shoko is the Doctor who takes care of your leukaemia, as of, she doesn't want anyone else beside herself to treat you.

Because, being one of the youngsters patients, you are far too fragile to be manhandled. And your leukaemia made you even more fragile. Shoko doesn't want someone who doesn't have experience like her to treat the youngsters.