he's probably only allergic to cashews and pistachios , which are apparently related to each other and unlike other tree nuts.
he has to have nut challenge with the other tree nuts and a raw egg challenge
unfortunately cashews and pistachios are more likely to cause serious reactions involving respiratory tract (ds asthmatic) so he still needs to carry epipen
also learnt that they no longer recommend having 2 epipen available at all times , just one needed as second rarely needed
so good appt and ds was very brave and had blood test 