[sloop]

i think its a disorder of the nerves - i am not sure it is well understood - i do know that arsenic poisoning is often diagnosed as gbs

http://www.mayoclinic.com/health/guillain-barre-syndrome/DS00413

Guillain-Barre syndrome is an uncommon disorder in which your body's immune system attacks your nerves. Weakness and numbness in your extremities are usually the first symptoms. These sensations can quickly spread, eventually paralyzing your whole body.

[CedarDave]

Think I’ll stay away from that vaccine. Got the standard flu shot about six weeks ago and have been fine.