to focus better: Is this the basis of a story you want to write? Or is the intent just curiosity?

In case a, answers could focus on "why there are no such cases" --> This would be a case for Writing or creative thinking maybe.

in case b, answers could only be given if there is one such case. But if you do not get answers, then you do not know if there are no cases at all or if the community just does not know any. --> could be a thing for the experts on crypto-science (it is currently not on Codidact, I figured), or medical, or psychology maybe.

to focus better: Is this the basis of a story you want to write?

Not at all. It's simply a matter of curiousity, however, my intentions for using the information wouldn't really be relevant here, especially not for Writing, because the topic of the question itself, isn't valid for that community. It would quite egregiously be outside of the scope there.

In case a, answers could focus on "why there are no such cases" --> This would be a case for Writing or creative thinking maybe.

Doubt it. That sounds more like speculation, something better suited in chat. I mean, if you'd wanna take the risk, you could try to prove otherwise. ;)

in case b, answers could only be given if there is one such case

An answer simply stating there have been no confirmed cases, or no statistics recorded, potentially just not available to the public anywhere, would be valid, and does answer the question in the best way possible at the moment.