Declan took his silver needles out and began to treat the old lady. Cancer was actually caused by cell mutation, but there was not a way to treat these mutations with the current medical technology. Therefore, patients could only choose to remove it. The removal of the cancer cells inevitably eliminated the good cells as well, which was why cancer patients were not as healthy as before even though all the cancerous cells were gone.
But this was a piece of cake for Declan. The cancer cells' mutation was no different from the ordinary virus. All he needed to do was just to purify them with spiritual energy.
Actually, there was just a thin line between simple and difficult things. For example, a cold that could be cured with a single pill in this era might have been fatal in ancient t
