[evandijk70]

Purely speculating here, but perhaps omitting the reason was a condition of the hypervaccinated individual to cooperate with the study?

[bee_rider]

Could be! Hard to say, right?

I would tend to assume that the person’s motivation is less interesting to the researchers, and getting into it could distract from the research. Plus, who knows, maybe Germany just has really strict ethical and personal medical laws, so the researchers could just want to avoid that whole minefield.