A wide range of viral infections can lead to ADEM and it could be aquired from vaccine administration.
Also associated with other vaccines, including pertussis, rubella, diphtheria, and measles.
Could there be an association of the influenza vaccination, particularly the swine flu vaccine???

http://adem.org/

ADEM), a neurological disorder characterized by inflammation of the brain and spinal cord, which is known to follow immunization.

And it doesn't show up on an MRI?
The MRI findings often disappear after the damage has been done.”

http://www.ageofautism.com/2009/02/...ruling-mmr-causes-autistic-disorder.html

It can follow vaccination for measles, mumps, or rubella it says right here.

http://www.ninds.nih.gov/disorders/acute_encephalomyelitis/acute_encephalomyelitis.htm

Measles Virus Postmortem
http://onlinelibrary.wiley.com/doi/10.1002/ana.410260213/abstract

Crohn's disease and a number of other chronic disease a link?

http://gut.bmj.com/content/48/6/748.extract

measles virus IgM antibody titre?

Landau-Kleffner
variant, autism, and other neurologic disorders
IgG IgM

http://www.icdrc.org/documents/Anne%20Connolly%20article%201.pdf