VIS is part of a wider European association called ESN. ESN encompasses almost 15 000 volunteers working for more than 500 sections like VIS, all over Europe. All those people are organized by several hierachical layers, from the national level (ESN Sweden) to the international board working and living in Brussels.
VIS is an old and influential section in the network; in fact, the current president of ESN, Safi Sabuni, used to be VIS' president in 2012! VIS in an excellent opportunity if you're interested in supporting the Erasmus spirit and making the lives of students better everywhere in Europe.