I would think it strengthens the argument for vaccination. Adults and older children are at great risk of serious illness due to lack of childhood immunity. I

I would think it strengthens the argument for vaccination. Adults and older children are at great risk of serious illness due to lack of childhood immunity. If none of us had polio vaccines, it would probably behave today much as it did in the mid-20th century USA, with periodic waves of outbreak that would leave dozens or hundreds dead and tens of thousands disabled.