Recent outbreaks of swine-origin pandemic H1N1 Influenza A (Schweinegrippe, pandemische H1N1 Influenza, neue Grippe) highlight the importance of rapid and sufficient supply for pandemic and inter-pandemic vaccines. Conventional dead virus vaccines are produced in embryonated eggs. Production in eggs is dependent on egg availability, recovery of approximately one dose per egg is quite low and the time between isolation of a new viral strain and a vaccine is quite long. Therefor we are developing alternative systems spanning from insect cell produced virus-like particles (VLPs) to plant expressed influenza antigens and alternative reverse genetic systems.