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On the iron lungs and the salk vaccine there is an interesting "conspiracy" theory I've seen. Incidence of polio correlates extremely well to production volumes of DDT and various insecticides. It's a startling chart. Production went way down and then so did polio.

The exact mechanisms of the polio virus have allegedly never been all that well worked out. The efficacy of the salk vaccine might be a coincidence.

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Wouldn't mind an explanation on why this is down voted.

Amazing changes have been occurring virtually daily in the past couple of centuries. Conspiracy theories tying them together on the basis of mere correlation are profoundly uninteresting.

Strong correlations are very interesting very often. And this particular hypothesis is interesting well beyond correlation if you care to read into it.

Be honest, the downvote was a close-minded reactionary impulse.

I didn't downvote it. I don't hit downvote very often.

You provided no evidence that it was interesting, and such evidence would be offtopic anyhow.

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