To die of germ warfare may be quick or over many, many years of very slow death aka gulf war syndrome, etc. To die from beubonic plague or anthrax is a bad way to go to paradice and what you do on earth follows you as permanent record for all time, no blood will cleanse the record or erase the past.
BOOK II and BOOK III are education of our environment and all other school books starting with BOOK I are education to counter ill effects and extend longevity.