This was done with Covid too.

From p.16 a) Economic Impetus: During the great epidemic of 1942-1962 polio victims were diagnosed with poliovirus-caused polio, regardless of whether or not the poliovirus was found, because the NFIP (March of Dimes) funds paid only for this kind of polio. Therefore, if patients were going to spend time hospitalized, in iron lungs and undergoing therapy, it would have been economically imperative for the hospital to diagnose them in this way.[18]Thus, presence of poliovirus in poliomyelitis was rarely determined in order to arrive at a diagnosis of polio.

DDT vs Polio (PDF) Everything You Learned About the Cause of Polio is Wrong

https://onecellonelightradio.files.wordpress.com/2017/02/everything-about-polio-is-wrong-ddt-good-for-me.pdf

The DDT – Polio Sham! | Polio Caused by Pesticide Exposure

https://christianobserver.net/the-ddt-polio-sham-polio-caused-by-pesticide-exposure/