Well, obviously vaccine poisoning skips generations!
DAMN you Jonas Salk!
SRSLY, while the whole mercury-poisoning-via-vaccine theory is and has been bullshit, and chelation therapies are hokum born of desperation, we can't ignore the environmental contributions -- including heavy metals -- to messed-up brain development.
But how do you figure out the most problematical environmental contributors? And if we identify (say) the top three smoking guns, how do you get them out of the environment / products in the face of industries ready, willing, and able to deploy F.U.D. to defend their profits?