Soligenix, Inc. Announced today that it has extended its development agreement with Emergent BioSolutions to implement a commercially viable, scalable production technology for the RiVax™ drug substance protein antigen. RiVax™ is a vaccine candidate being developed to protect against ricin exposure. This specific agreement will build upon process development work conducted to date in support of manufacturing scale-up that will eventually be performed in accordance with current good manufacturing practices (cGMPs) at Emergent’s manufacturing facility located in Baltimore, MD.