Do you have a family member or friend who is active? Do you have a family member or friend who has a balance issue, who is "just" clumsy, or who by unlucky circumstances will fall down a stair/s, hit their head on a low ceiling, get in a car accident, etc....You might be interested in the new study funded by the NIH which concluded "
"that measuring tau levels could potentially be an unbiased tool to help prevent athletes from returning to action too soon and risking further neurological injury."
Potentially, this study could affect the management of anyone who suffers a concussion.
https://www.nih.gov/news-events/news-releases/biomarker-blood-may-help-predict-recovery-time-sports-concussions

Blood protein tau could be an important new clinical biomarker to better identify athletes who need more recovery time.