Zombies are, insofar as I understand their biological classification, undead. They aren't entirely dead, but they certainly aren't fully alive either. That sounds a lot like life with a serious chronic disease. When one's life no longer involves pleasure or the pursuit of interests, it is something of a half-life.
I count it a lucky break to have been born in a day and age when answers to the question "Why do I have to die?" were still looked for in the experimental laboratories of art and literature as well as in the teachings of religion. The problem hadn't yet been referred to the drug and weapons industries, to the cosmetic surgeons and the neuroscientists.