I'm looking at the CombiRx trial (combining Avonex and Copaxone) and the Campath trial. If I had to do one, I'm leaning more toward the CombiRx, but Campath does sound attractive.
In the release form for the Campath trial, it explicitly states that the cost of treatment for any injury caused by the trial is the responsibility of the patient. Now, they do cover the costs of the drugs and anything they need for the trial, like MRI's, blood tests, etc. And they will make their facilities available to the patient in case treatment is needed for flareups, such as with IV steroids. But the cost is still the patient's responsibility.