SSI, Statens Serum Institute, is a public enterprise under the Danish Ministry of Health. On behalf of the Ministry, SSI will conduct the procurement of a pandemic influenza vaccine. The purpose is to ensure the needed stock of influenza vaccine in the event of an influenza pandemic. The offered contract regards reservation of the supplier's production capacity as well as delivery of pandemic influenza vaccine in the event of an influenza pandemic called by the WHO during the contract period.