A friend of mine is going on exchange under the Erasmus programme in Germany. She is a EU-citizen and has EHIC card. Does she need another health insurance or is the EHIC card enough for her stay?
For Erasmus, the EHIC card from the home country is enough. During her stay, your friend is still officially registered as a student in your home country so that is where she is registered for health insurance. In addition, EHIC card entitles one to necessary health care in all EU countries so she is covered in case of an emergency. Still, it can be a good idea to get a complete medical checkup before leaving as that is something that is not, to my knowledge, covered in other EU countries.