Prion disease appears average of 24.5 years after infection. Median time is 22.5 years. Time from appearance of initial symptoms to death is 12-14 months. Of course, the mRNA vaccines may be designed to be much faster acting. It does not make sense to have a massive die-off all at once. IF this is the true plan, then it is far more sensible to kill off the population in manageable numbers. Perhaps each vaccine has a built in timer. A few vaccines will have no adverse effect. And “the elite” will get fake vaccines, saline, or maybe vitamin B to enhance immunity. I’m not big on the “conspiracy” talk, although these days, truth is often stranger than fiction.
Of the vaccines that use human tissue, does any of it come from the brain? If so, look for a prion disease called Kuru to emerge. Up through the 1960s, a tribe of Papua New Guinea was plagued by kru, the source of which was traced to the custom of eating the brains of their enemies and ancestors. Look it up!