What actually happened is Joliot turned into a supervilain, he killed Pierre Curie before he could become a superhero, but was ultimately defeated by Henri Bequerel, who is immortal.
I thought this was common knowledge.
In the meantime Irene Joliot died of the radiations, as everybody would expect.
I’m European and it is the fist time I realize these are 2 different persons. I always mixed them up to now.