The oral polio vaccine (live attenuated virus), which was the second generation of vaccines against polio, is a live inactivated virus.
It has the benefit that it creates mucosal immunity (immunity in your guts, throat, lungs) by making type A immunoglobulins. It has the added danger of rarely causing polio which is why it's only given in countries with endemic wild type polio where the risk of getting vaccine type polio (which causes small outbreaks, pic related) is smaller than that of getting real wild type polio after vaccination with a weaker IPV (inactivated polio vaccine), which spreads pretty well.
Your kids in the developed world won't get the oral polio vaccine because their risk of polio is negligible and because the people who make vaccine schedules aren't morons as much as you'd like them to be, but they will get the injected IPV (which has about 0% chance of conversion into active virus).
Even in the developing world, as wild type polio disappears, the transition to inactivated polio vaccine is occurring
https://www.who.int/immunization/diseases/poliomyelitis/endgame_objective2/en/ >tl;dr you've discovered nothing and you're stupid to think you can make conclusions from an AP article with no background education. 
