The establishment of cell culture-derived vaccine production requires the development
of appropriate downstream processes. Until today, many of the downstream
methods applied originate from egg-derived production processes. These
methods have often been slightly modified in order to account for the new
demands. However, efforts are currently underway to optimize these processes
focusing, for example, on ion exchange or affinity based membrane adsorption
chromatography. This review covers the main aspects relevant for the downstream
processing of egg and mammalian cell culture-derived whole influenza
viruses.