I have used epoxies from age 15 and am now 65. I developed the allergy in my 30s possibly / propably as a result of dry sanding epoxy inside my house. Over the years my sensitivity has worsened. If I am around epoxy dust I get ill. It starts with prickling around my mouth and if I ignore this I will get severe nausea and respiratory problems. I also have a problem with some kind of dermatitis on my fingers which MAY be linked, however despite visits to a dermatoligist this is not certain as it comes and goes with no detectable link to my use or contact with epoxy, it may be stress related.
As you can imagine I have to be careful in boatyards.
However if I wear latex gloves, stay upwind of the work piece using a fan if necessary, always wet sand, take care to dispose of any dust AND shower after any epoxy work ,I can still work with epoxies.
Monkey patching programmer [retired ]