So in the U.K. alone depending where you fly from you could receive “caution wake turbulence, the recommended spacing is...” or separation applied (or not) variably based on CAA MATS Part 1, USAF, RAF, individual MATS Part 2 eg RECAT/CREDOS/TBS rules each subtly different from ICAO never minding local rules on what constitutes an intersection, relevant proximate runway or taxying near a runway. No wonder the question comes up.
Are there any examples of helicopter incidents due to fixed wing wake turbulence? I don’t remember any.