The typical cell-culture production process can be run in batch sizes of practical scale, sufficient to provide vaccine quantities for interpandemic periods and pandemics. However, to date, no vaccines have been licensed using this technology. Chiron has already submitted “mock-up” dossiers to European Union (EU) regulatory authorities for review and approval of an avian influenza vaccine (currently in clinical trials) and a license application for a cell-culture-based vaccine. This paper is focused on the cell-culture vaccine manufacturing process used by Chiron, as well as the use of adjuvants to enhance immunogenicity and reduce dosage size