Repeated head injuries could reawaken a dormant virus in the brain, triggering the onset of Alzheimer's Disease and dementia, scientists have found. Researchers from Oxford's Institute of Population Ageing,

A study using lab-made models of the brain suggests that a herpes virus may be a key link between concussions and dementia risk.

Concussions and repetitive head trauma in sports like football and boxing, once accepted as an unpleasant consequence of intense athletic competition, are now recognized as serious health threats.&nbs