I had no idea how sick I was until I did IVIG and finally felt semi normal again! I feel it when it wears off and I get floppy weak all over... can't swallow eyelids droop etc... my friends and cowworkers always know when I'm due for IVIG as my face looks bad when I'm due.. I have gotten aseptic meningitis due to too fast of a rate, but it was just pain and aches.. not "serious" otherwise.. we control it by controllling the rate, and I am a big IVIG advocate, as I got my life back! I do it every 2-3 weeks