THE WOODLANDS, Texas--(BUSINESS WIRE)--Opexa Therapeutics, Inc. (NASDAQ:OPXA), a company developing Tovaxin®, a personalized T-cell immunotherapy for multiple sclerosis (MS), today announced that it has achieved its first technology transfer milestone in connection with the company’s recently announced exclusive stem cell agreement with Novartis, one of the world’s largest healthcare companies. The milestone was completed on schedule and triggers a payment of $500,000 to Opexa.