Campath is a monoclonal antibody that the NIH started using for people who did not successfully respond to ATG. Prior to being used for AA, it was used in chronic lymphocytic leukemia patients. I did not respond to ATG/cyclosporine and was subsequently treated with Campath (in 2004 at age 24) at NIH. The side effects during treatment were much more mild than with ATG, but my blood counts (all three cell lines) were in the toilet for several months after the infusion. Eventually, I did become transfusion-independent and have been that way every since.
The link below is a series of Campath-related posts on Aplastic Central. (If the link doesn't work for some reason, just go to aplasticcentral.com, click on "forum", and search for "campath".) If you have any questions, let me know.
-Becca
http://aplasticcentral.com/test/toas...fid=2&tid=2332