I can roll around in poison Ivey and not get it unless I have a scratch or cut on me then it gets me at that spot. Used to get it as a kid but not anymore. Odd.
Heh - I used to NOT get it as a kid or young adult.
Several years ago I got a few tiny blisters. Somebody told me that you can be immune at first but as you keep getting exposed to it your tolerance diminishes.
But obviously not in your case. I’m guessing that poison ivy theories and remedies is one of the largest topics of old wive’s tales and such.