"Well I look at "Zombie infection" more like a desease then somthing super naturural, for example, I look at it like a hyper-active and extreamly agressive rabies.

And rabies spreads one way by bites, becuase it is in the saliva, and the infected saliva gets into the blood stream and spreds thoughout the body.

So if the zobie infection works like rabies, it may be posible to rid the infection by cutting away where the saliva has spread and destroying any lingering infection by buring the cut, however, I think the bite whould have to small in order to do this in time and with out killing the bitten.

But that is just the my theory about how to save someone. "