Viropro Inc. (PINKSHEETS: VPRO) blew up 2700% on Wednesday after the company revealed it had signed a Letter of Agreement with Spectrum Pharmaceuticals (NASDAQ: SPPI) for the development and clinical production of a biosimilar version of Rituximab. Wiki reports that Rituximab is used in the treatment of many lymphomas, leukemias, transplant rejection and some autoimmune […]