So, what are we doing about it? Well, the most important thing at all levels of the game is education and our message is simple - recognise and remove.
If any player demonstrates any signs or reports any symptoms of possible concussion, that player must be removed from the game and must not return to play. That is non-negotiable and we are making good progress in this from Eden Park right down to school playing fields.
There is no such state as "a little concussed" and rugby therefore exercises caution. Concussion is a complex injury and it is not always possible to diagnose it immediately. So we treat suspected concussion exactly the same as confirmed concussion. Get the player off the pitch, and don't let him or her back on. Before that player can play again, he or she must undergo a medically supervised graded return-to-play protocol to make sure the brain has fully recovered from the knock it received. If a player does not have access to medical supervision, a mandatory stand-down period applies.
At the elite level of the game we have introduced another protective measure, known as the Head Injury Assessment (formerly known as the Pitch-side Suspected Concussion Assessment). The HIA tool is often misreported as a means of diagnosis of concussion. It is impossible to make a clinical diagnosis of concussion in 10 minutes and therefore the HIA is designed to assess a player following a head knock when the diagnosis is not apparent.
Reports from medical staff and players confirms that the value of this intervention is the allowance of a temporary removal from play so that a head injury assessment can be undertaken. Prior to the introduction of this temporary substitution, the assessment of a player was completed within one minute, on the field of play.
This resulted in 56 per cent of players with confirmed concussion returning to play. Since the introduction of temporary substitution and standardised assessments, this figure has reduced to 13 per cent. This research has been independently reviewed and has been approved for publication by the British Journal of Sports Medicine.
The goal of the IRB is to drive this 13 per cent down to zero.
The HIA has reinforced the fact that education and cultural change are key to protecting our athletes. Players, coaches and parents at all levels must understand the dangers of concussion and the need to put the welfare of the player at the heart of all they do.
Concussion is a brain injury. It is not to be taken lightly. It is a complex subject and the IRB is engaged in research with Auckland University of Technology to learn more about the long-term effects of concussion.
The message from the IRB is simple - recognise and remove.
Brett Gosper is CEO of the IRB.