Hopefully in time, NZ & Australian regulators (Qld, NSW, Vic & WA) will adopt South Australian regulation i.e. Combat sport participants have to undergo MRI before they're allowed to jump into the ring. Such test is valid for 3 years. ATM, Australian regulators are by far more focused on Hep B, C & HIV/Aids & ignoring possible brain cell damage, which could result in ring fatality. IMO, after a bit of research, Hep B is no threat to opponent nor referee.
