CTE ruins lives but can’t be confirmed until you’re dead. Canadian scientists are trying to change that

<img src='https://i.cbc.ca/ais/ed307bef-003f-40e6-87ff-568b9e4a028c,1780958237158/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C0%2C1920%2C1080%29%3BResize%3D%28620%29' alt='A man looking off into the distance' width='620' height='349' title='Brendan Hynes, a veteran of the Canadian Army who has CTE (chronic traumatic encephalopathy), is shown at his home in Ashton, Ont. on Thursday, May 21, 2026.'/><p></p>