Sure Michel,
me either not MD :) but trying to be educated on the subject.
(as much as possible)
Flu vaccines must be more mature technology... with much less level of side effects.
Recently have seen one source which again put more questions than
answers, and references looks OK...
https://www.researchgate.net/publication/357994624_Innate_Immune_Suppre…
Who knows....
Any way, my opinion is that EASA must take some
steps soon, toward the research on the subject.
Regards
Djani