It's the distance between cause and effect. What were you doing 5 years ago today? In 2 years, maybe you develop a 100% fatal disease and die because of it - an

It's the distance between cause and effect. What were you doing 5 years ago today? In 2 years, maybe you develop a 100% fatal disease and die because of it - and there's no way to verify until you actually do or do not die of it, so you don't know it's coming. The only reliable prion disease diagnostic is brain tissue biopsy.