NEEDHAM, Mass.--(BUSINESS WIRE)--Celldex Therapeutics, Inc. (NASDAQ: CLDX) announced initial results from multi-center Phase 1 clinical trials of its cancer vaccine candidate, CDX-1307, combined with GM-CSF, at the International Society for the Biologic Therapy of Cancer (iSBTc) annual meeting in San Diego. These data provide the basis for the ongoing assessment of CDX-1307 combined with more potent adjuvants with data expected in the first half of 2009.