I know this sounds stupid but I only have the basics in biology and microbilogy. It seems to me if the cell can create this germ/disease then why cannot the same cell cure the disease by introducing a destroying agent into the cell and or morphe the negative cell disease into a cancer killing machine to kill all opposing cancer? pljames

That's only sort of possible - for example, it's possible to create viruses that only attack other viruses. Those can be used to destroy the viruses that are attacking the body.

 

In terms of creating an "anti-virus," it might be possible, but a lot of the damage that viruses cause is very complex, and it would be bloody hard to undo it.