Question From Derps: how is it that COVID vaccine isn’t 100% effective when Polio vaccine is?

Answer For Derps: polio vaccine isn’t 100% effective. How many people surround you that have polio (zero)? After a successful vaccination campaign the disease is pretty much non-existent in North America. If people carrying polio were all over the place like COVID, you would see what you are seeing now with the COVID vaccine and some positive tests after vaccination.

Polio was pretty much eradicated with vaccines because there was a time before the internet.