It's so amazing - I still get grinding, overwhelming spells of fatigue, but over the last week or so, I've had some renewal of energy! I think the Tysabri, is finally starting to work! I have gotten amazing fatigue these past two months about a week and a half before my infusion. In May, after the infusion, the fatigue seemed to lighten up slightly, and this month, after June's infusion, I feel better than I have in months in the energy department.