Name: Blood test may detect Alzheimer’s 16 years before symptoms
Uploaded: Wed Jan 23 2019 14:26:09 GMT+0000 (UTC)
Duration: 2 min 59 s
Description: New research finds that a blood test may detect Alzheimer's disease up to 16 years in advance. TODAY’s Craig Melvin, Dylan Dreyer and Al Roker, along with NBC special anchor Maria Shriver, discuss.

Jan. 23, 201902:59