Wow, you guys are exhausting! The stream of misinformation is endless.
OK, regarding India - look at what lavolcan and accuracy are saying. They weren't talking about polio but babbling on some complete tosh about how they didn't get sick in INidia because they weren't vaccinated.
Now, regarding polio in India. If you use OPV, there is a small chance of vaccine induced polio - that is a well documented side effect (despite the fact that you all beleive that side effects aren't documented). However, OPV is essential for preventing polio transmission so in countries like Nigiera and India, if you want to eradicate you must use it. For individual protection, you can also add IPV which is why the Indian Academy of Paediatrics recommends both vaccines together. It is NOT a reason to abandon vaccinations as actually getting polio is far more risk and there are ways to reduce the chance of this unfortunate side effect (it may not always happen in many of these countries but that is not vaccine specific and applies thoughout the medical system and beyond).
regarding measles mutating - OK, so we need to continue to research and find new vaccines for the mutation. Again, not a reason not to vaccinate as the old virus may still be circulating.
And finally, there is endless research into vaccines and side effects are maybe under-reported (as for all medicine) but unlike other medicines, vaccines are given to hundreds of millions of children (and adults) throughout the world, Even under reported small effects will be picked up. You have plenty of information on which to base an informed decision and that evidence is that apart from a very small number of children, it is in the best interest of children to be vaccinated agaisnt the majority of diseases we vaccinate against.