With a renewed acceptance of perfusion processesin cell in culture, both in the laboratory and for production applications (1), New Brunswick packed-bed bioreactors using Fibra-Cel® disks are seeing an upsurge in interest. This article examines Fibra-Cel technology and its many advantages, from increased yields of secreted proteins to labor savings in applications ranging from rabies vaccine production to production of the first licensed gene therapy drug.   What Is Fibra-Cel?   Fibra-Cel from New Brunswick…