I had one
Tysabri treatment on Nov. 1, 2011. Felt great for 2 days. On day 3 I awoke with a bad
headache and bumps the size of mosquito bites all over my face and neck, plus a huge, dark red circle on my right cheek. The Dr. stopped the treatment forever for me because of the extreme reaction.
I was diagnosed with MS 20 years ago.
Been on Avonex, Betasaron, Rebif, Copaxone, Tysabri, and now, Copaxone again.
I tested negative for the JC virus, but scheduled for an MRI very soon.