Just like with flu vaccines, the people in charge lie. Polio was already going way down. It was spread through feces, and around the same time, we had most people by then, with indoor bathrooms, which gave us better hygiene. After the polio vaccine came out, they changed the standards for what was polio. Before the shot, anyone who was paralyzed at all was listed as having polio. Also, at this same time we used DDT, which was later shown to cause things like paralysis. It went from any paralysis, to you had to be paralyzed for 3 days. They also changed the names of some of what they called polio to guillain barre syndrome.

The CDC did the same thing with the flu. Back in around 2000, they didn't have enough people getting the flu shots. So, they lumped ALL pneumonias into the flu category, even though pneumonia from flu is only around 7%. Flu deaths went from 300 per year, to 30,000 in one year. A guy from the CDC bragged about this in the Huffington Post. And, he still is at the CDC. These people need to be in jail.