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People dont usually die from polio. They get crippled

Polio was the result of the pesticides that were sprayed on the produce in the early 20th century. It contained mercury which allowed it to stick to the fruits and vegetables. This concentration of mercury destroyed nerve cells in combination with the other awful ingredients of the day.

I saw a documentary blaming DDT they used to spray it right on people.

Which one did you watch do you remember by chance? I used to follow this guy on Facebook that would do them but deleted mine and can’t remember his name. It might come to me eventually. Something Forest maybe
Maybe it was DDT and mercury, I know he was saying it stuck well to the vegetables and fruits.

I think this is it, a lecture not a documentary

Hygiene, Refrigeration, Water purity, Sanitation are the reason disease rates have plummeted , real science.

Yes, many vaccines are useful. Some are not. Some have material in them that are problematic for the health of certain people, at the least.