One of the problems with CTE is we still aren’t positive what is causing it. There is at least some evidence that low level repetitive hits to the head are as bad or worse than concussions in this regard. If that is true Rugby is going to have its day of reckoning in CTE (as is soccer).

Concussions are bad in any case, so it’s great that we are trying to prevent them, but I’d be very careful assuming any contact sport has a handle on the issue yet. Especially not one with a scrum.