From 2005 until now, rates of peanut allergies have increased 2-fold or more in the US. Similar for tree nuts. Anecdotally, it feels like more. There's a huge generational shift even among recent parents, where it feels like a problem just didn't have very long ago, but we do now.

It's true that we had bad advice to not introduce peanuts which provably made the problem worse (and has now been reversed), but this is only part of the problem. Papers on the subject make clear that are other countries that are not doing intentional early-introduction (which we are now in the US) and don't have the problem.

It's also abundantly clear from the research that the population-scale problem is 100% environmental... as you would expect since the SAME POPULATION saw rates go through the roof in a decade. It's something we did, environmentally, and we don't know what.

It also feels frustrating that the medical profession seems overwhelmingly incurious about discovering whatever it is we're doing that is literally harming children.