Take a look at http://www.mayoclinicproceedings.org/article/S0025-6196(14)00332-2/fulltext http://www.mayoclinicproceedings.org/article/S0025-6196(14)0... and t

Take a look at http://www.mayoclinicproceedings.org/article/S0025-6196(14)00332-2/fulltext http://www.mayoclinicproceedings.org/article/S0025-6196(14)0... and the included video. The first patient did have a recurrence of a single tumor that was treated locally, with her marrow remaining completely clear. The second patient had his marrow cleared and all but a couple tumors in his legs resolved. And the virus penetrated those tumors and allowed full 3D mapping of them due to tags attached to the virus itself (it sounded like a thyroid produced chemical was attached to the virus as a tag). The implication was that because of the detailed mapping that it would be possible to resolve/remove the remaining tumors in the leg muscles of the second patient. So, the answer is quite a bit much more complex than 50%. Both patients cleared the myeloma from their marrow. Almost all (numerous!) tumors were removed, from a single treatment in each patient. Edit: Here's a link to the editorial article that accompanies the paper: http://www.mayoclinicproceedings.org/article/S0025-6196(14)00368-1/fulltext http://www.mayoclinicproceedings.org/article/S0025-6196(14)0...