Anti-vaccination hysterics are fond of yelling about "poisonous mercury" in vaccinations, and some activists claim a few kids are "susceptible" to a greater degree, to any mercury.

Even though actual science, like in Denmark, looked at vaccinated and unvaccinated kids.

The numbers of autistic kids was almost equal.

So why do some groups continue with this dangerous lie, where "vaccinations cause autism?"

1rst group is the smallest, fortunately.
People who are certifiably paranoid schizophrenic.
"The voices in my head tell me doctors are evil!"

2nd group have their agenda, there are more of this group.
Everything is for the agenda, in this case "science is evil."
Ben Stein said "Science leads to the gas chambers, faith leads to humanity."
And any evidence against the Agenda is "corporate shills," "brainwashed," or even "Satanic."

3rd group is the largest group.
They are in it for the money.
Anti-science pays nicely, with lectures, books, movies, etc.

which is why sensible people call them kooks.

It's also why wise states have passed public health laws with real teeth in them.