I am a relatively young Empath, I was taking care of a patient with a light internal bleeding, which almost immediately turned into an infection.
I spent nearly three anlaen casting cure disease and transfering the condition from said patient. I cast the spell probably at least forty times. I still did not get all of the infection. The patient was quite frustrated with this situation as was I.
Considering Town Healers will not take care of this, and the patient's body will fight it off in a few anlean itself with enough stamina usually, I felt completely frustrated and useless with this matter.