SSM and IEA share the same origins, and almost the same founding group. Each was started in 1957, with very similar aims and objectives. They have also shared conferences (e.g. Oxford and Cork). SSM is the society representing the UK (and also still Ireland) on the European regional board of the IEA, as IEA is administered along the lines of WHO regions. IEA offers reduced membership subscriptions for members of recognized / signed up national (epidemiology) societies.