Same with receiving a fatal dose of radiation poisoning.

People will want to study you. Do yourself a favour and immediately kill yourself via a guaranteed method.

Prion diseases are fatal infectious neurodegenerative disorders and prototypic conformational diseases, caused by the conformational conversion of the normal cellular prion protein (PrPC) into the pathological PrPSc isoform.

The immune system does not develop a bona fide immune response against prion infection, as PrPC and PrPSc share an identical protein primary structure, and prions seem not to represent a trigger for immune responses. This asks for alternative vaccine strategies, which focus on PrPC-directed self-antibodies or exposure of disease-specific structures and epitopes. Several groups have established a proof-of-concept that such vaccine candidates can induce some levels of protective immunity in cervid and rodent models without inducing unwanted side effects. This review will highlight the most recent developments and discuss progress and challenges remaining.

Have a read through the full article and sources below and you can take a look at some novel approaches being evaluated at the moment:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9918406

1. if you are infertile, then early or late does not matter

2. either way, the individual "you" does not matter to evolution that works on a population basis (not strictly speaking fully true bc of e.g. bottlenecks, like Mitochondrial Eve, Y-chromosomal Adam, and Genghis Khan, but the idea of "population" can be extended to include such founder effects). i.e. your genetic makeup is determined by millions of years of prior evolution, not what you had for breakfast this morning, so regardless of current fertility status, events such as Alzheimer's are "okay" (again, caveat: purely in the evolutionary sense - though it is horrifying to an individual who gets it) bc they occur post reproductive age, i.e. it is too late bc the genes have already been passed on to another generation.

Insert additional caveats to literally all of this, and also caveats to those caveats, bc biology cares little for how easily it can be understood:-D. e.g. kin selection is also a thing, long past reproductive age and also works for infertile people.

Prions are gone rogue, by being shaped a different way. They are uniquely different from their original protein. At the end of the day Viruses are also just normal DNA that went rogue and changed over time. The difference is that viruses can spread and mutate much more easily, so they could adapt under evolutionary mechanisms.