In your hypothetical of it only costing a few dollars a year the economic savings just by not having children be sick even once would easily outweigh any downsi

In your hypothetical of it only costing a few dollars a year the economic savings just by not having children be sick even once would easily outweigh any downsides. Also, we already have this for many diseases. They’re proven and they work just fine. Nobody reasonable is advocating you avoid the flu shot just because “everyone now has the same immunities”.