For anyone who wonders whether or not it's important to know if there are treenuts that your child is allergic to.... versus NOT (or at least 'not-that') allergic to...
DD's school Europe tour bus must be free of those anaphylaxis triggers that she is demonstrably aerosol/contact sensitive to (at least in a big way, KWIM? Hives are one thing, but anaphylaxis rolling down the M40 somewhere south of Birmingham isn't ideal, to say the least.
The problem is that on a packed school tour, the kids HAVE to pack snacks. They have to-- it's as much as 5-7 hours between meals, and there is a LOT of physical activity in that time. Those snacks must be: a) lightweight, b) high energy, and c) shelf-stable.
Granola bars, energy bars, and nuts/seeds, right?
Well, in that family of things it is REALLY important to avoid only those things which pose actual contact/inhalation risk to a person who is allergic.
For my DD, those things are cashews and peanuts. Like, those things REALLY cannot be consumed within 5-10 feet of her, no matter how careful the handwashing or whatever is afterwards.
What this means, though, is that almond-based snacks are okay. That's important for other people to know.