> People vary greatly in their sensitivity to urushiol. In approximately 15% to 30% of people, urushiol does not trigger an immune system response, while at least 25% of people have a very strong immune response resulting in severe symptoms.
I've also heard this about poison ivy. (I assume cashew plants have less of this irritant than poison ivy does.)
https://en.wikipedia.org/wiki/Urushiol-induced_contact_derma...
and it notes that
> People vary greatly in their sensitivity to urushiol. In approximately 15% to 30% of people, urushiol does not trigger an immune system response, while at least 25% of people have a very strong immune response resulting in severe symptoms.
I've also heard this about poison ivy. (I assume cashew plants have less of this irritant than poison ivy does.)