Study of Subcutaneous Campath-1H in Patients With B-Cell CLL and Residual Disease After Chemotherapy

To evaluate whether CAMPATH-1H given to patients with CLL after maximum response to chemotherapy will: a) eliminate minimal residual disease (documented by flow cytometry) in patients who have achieved a complete remission (CR) or b) convert partial remission to complete remission. To evaluate the time-to-progression of patients according to pretreatment characteristics and response status at study entry. To evaluate whether CAMPATH-1H given to patients with CLL after maximum response to chemotherapy will eliminate minimal residual disease as determined by real-time quantitative PCR.