That is create. As hygeine was improving along with improved sanitation, polio was already decreasing. 10 years ago, I hired some temp workers from central America. Even though they spoke English and were legal, they still would nit flush used toilet paper down the toilet. They would discard it in the trash. The told me thst was how they were brought up, due to poor plumbing. They would not change their false behavior. Fecal matter is what spreads many of these diseases.
That is “Correct” not “create”. Do not know where that came from.