Hissen

Hissen is a China-based human vaccine company originating as Dalian Hissen Bio-Pharmaceutical and now operating under the AIM Bio group as AIM Honesty Biopharmaceutical. The company focuses on the research, manufacture and commercialization of prophylactic vaccines, with a core commercial product in recombinant hepatitis B vaccine produced using a Hansenula polymorpha yeast expression system. Available secondary-source pipeline information indicates additional marketed vaccine products or programs in influenza and rabies. Hissen appears to operate primarily as a vaccine manufacturing and commercialization business rather than a broad clinical-stage therapeutic biotech, and it is part of AIM Vaccine's larger vaccine platform and industrial network.