Brains before brawn in modern rugby | Letters

Sport authorities must address the heightened risk of repetitive brain trauma in the fierce modern game, writes Dr Donald WilliamsRugby is clearly in crisis as it attempts to address the escalation of concussion and its consequences in the modern game (World Rugby’s brain health service finds 25% of ex-players ‘at risk’ of problems, 30 April). Unfortunately the crisis will continue unless the regulatory authorities understand, accept and address the brain’s vulnerability