the G-man wrote:
AIDS was similar to the zombie plague in the beginning -- when you had the virus, it WAS a death sentence. But drugs were developed so that people like Magic Johnson could celebrate 20 years of living despite the death sentence.
How unrealistic would be for Hershel to have that same hope in mind?
And, in fact, Hershel mentioned AIDS and AIDS hysteria very early on when discussing the plague with Rick.
But he said the walkers in the barn could be "restored." Finding a cure for an infectious disease might be realistic, bringing half-rotted corpses back to life is pretty clearly not.