You really cannot make sense of something this basic? So how on earch could you
*snip*
You're still not making sense. I'll be inclined to discuss this topic further when you've shown you can do so in an appropriate manner. You can start by addressing these facts:
FYI, this is how polio infection occurs:
* virus enters mouth and/or nose following exposure to contaminated food or water (e.g. tiny traces of fecal matter) or an infected person (e.g. droplets from cough, sneeze, kiss); this can happen simply by touching your hand to your mouth after it has been in contact with a contaminated substance
* virus multiplies in the throat
* virus descends from the throat to the gastrointestinal tract
* virus multiplies in the gastrointestinal tract
* virus enters the bloodstream
* virus is carried via the bloodstream into the central nervous system
* virus replicates, and destroys motor neuron cells
In my opinion we would be foolish to put all our eggs in one basket.
Vaccination is not 'putting all our eggs in one basket.' It's a case of applying the appropriate medical solution to a specific medical problem.
We can not truly know the possible future effects of a vaccine.
Yes we can. That's why we test them, and monitor their effects for many decades after they're introduced.
Does hygiene affect our resistance in a negative way over time/across generations ?
*edit: general resistance mechanisms and resistance to specific diseases
No. But lack of hygiene certainly does.