Results from 18 assessable patients were presented by Matt E. Kalaycio, MD, of Cleveland Clinic's Taussig Cancer Institute, Cleveland, OH. Other research sites included Low Country Cancer Care Associates in Savannah, GA; Weill Cornell Medical College in New York, NY; and the Carol G. Simon Cancer Center, Morristown, NJ. The overall disease control rate was 83%, with 12 patients having stable disease (SD) and 3 patients (17%) reporting a partial response as their best responses. Four SD patients had relapse-free survival for 6 – 12 months and all 3 partial responders were relapse-free at 6, 12 and 24 months. Despite cumulative doses ranging from 320 to 5120 mg, similar disease control rates were observed across all 3 dose levels (80 vs. 160 vs. 320 mg) and dosing schedules (cohort 1 vs. 2).

Commenting on these findings, Cynthia L. Sullivan, President and Chief Executive Officer of Immunomedics remarked, "We are encouraged by these results, which demonstrate that subcutaneous injection of veltuzumab is convenient, well tolerated and active in both relapsed ITP and CLL." "These results support further studies of subcutaneous veltuzumab, including combining it with other agents or given as a maintenance regimen," Ms. Sullivan further remarked.

About Immunomedics

Immunomedics is a New Jersey-based biopharmaceutical company primarily focused on the development of monoclonal antibody-based products for the targeted treatment of cancer, autoimmune and other serious diseases. We have developed a number of advanced proprietary technologies that allow us to create humanized antibodies that can be used either alone in unlabeled or "naked" form, or conjugated with radioactive isotopes, chemotherapeutics, cytokines or toxins, in each case to create highly targeted agents. Using these technologies, we have built a pipeline of therapeutic product candidates that utilize several different mechanisms of action. We also have a majority ownership in IBC Pharmaceuticals, Inc., which is developing a novel DOCK-AND-LOCK™ (DNL™) method with us for making fusion proteins and multifunctional antibodies, and a new method of delivering imaging and therapeutic agents selectively to disease, especially different solid cancers (colorectal, lung, pancreas, etc.), by proprietary, antibody-based, pretargeting methods. We believe that our portfolio of intellectual property, which includes approximately 209 active patents in the United States and more than 400 foreign patents, protects our product candidates and technologies. For additional information on us, please visit our website at . The information on our website does not, however, form a part of this press release.

This release, in addition to historical information, may contain forward-looking statements made pursuant to the Private Securities Litigation Reform Act of 1995. Such statements, including statements regarding clinical trials, out-licensing arrangements (including the timing and amount of contingent payments), forecasts of future operating results, potential collaborations, and capital raising activities, involve significant risks and uncertainties and actual results could differ materially from those expressed or implied herein. Factors that could cause such differences include, but are not limited to, risks associated with any cash payment that the Company might receive in connection with a sublicense involving a third party and UCB, which is not within the Company's control, new product development (including clinical trials outcome and regulatory requirements/actions), our dependence on our licensing partners for the further development of epratuzumab and veltuzumab for non-cancer indications, competitive risks to marketed products and availability of required financing and other sources of funds on acceptable terms, if at all, as well as the risks discussed in the Company's filings with the Securities and Exchange Commission. The Company is not under any obligation, and the Company expressly disclaims any obligation, to update or alter any forward-looking statements, whether as a result of new information, future events or otherwise.
CONTACT: For More Information:         Dr. Chau Cheng         Senior Director, Investor Relations & Grant Management         (973) 605-8200, extension 123

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