The 43rd Scandinavian Society for Immunology Meeting takes place in Turku, Finland, 10-13 May 2016, at the Radisson Blu Marina Palace Hotel, street address: Linnankatu 32. The meeting presents cutting-edge research in immunology from basic aspects to translational studies. This years focus is on the recent exciting discoveries in novel approaches in immune regulation and emerging understanding on the interaction of our immune system and microbiota.