Given the current state of technology, one would think we would each be wearing a thumb drive on a lanyard around our neck that any medic could access almost instantly. I suppose privacy concerns are the greatest factor precluding that.
Good point. Actually, we're getting a bit closer with a document standard called a CCD which defines the structure for what might be in the thumb drive. Privacy is probably no longer the limiting factor. Making sure the data on the drive (or more likely, the web repository) is up to date is a bigger issue.