There is medical work that outlines that polio only took root in a population with low level malnutrition and environmental stressors like chemical exposures. IOW, the immune system needs to be weakened or it fights off polio without too much trouble, even in children.
In fact, in the height of the polio scares in the US, the recommendations were to get kids out of cities where they could have lots of sunlight, fresh air, good food grown locally, and exercise all day. So healthy normal childhoods prevented polio.
If memory serves, the whole "vaccines stopped polio" narrative is a straight up lie and the numbers were going down once people started implementing basic hygienic practices to avoid it.
There is medical work that outlines that polio only took root in a population with low level malnutrition and environmental stressors like chemical exposures. IOW, the immune system needs to be weakened or it fights off polio without too much trouble, even in children.
In fact, in the height of the polio scares in the US, the recommendations were to get kids out of cities where they could have lots of sunlight, fresh air, good food grown locally, and exercise all day. So healthy normal childhoods prevented polio.
If memory serves, the whole "vaccines stopped polio" narrative is a straight up lie and the numbers were going down once people started implementing basic hygienic practices to avoid it.