When travelling abroad one has to keep in mind that numerous unexpected costs might pop up, therefore, we have the concept of travel insurance policy.

Extract from "Regulation (EC) No 810/2009 of the European Parliament and of the Council of 13 July 2009", which entered into force on April 5 of 2010:

... Applicants for a uniform visa for one or two entries shall prove that they are in possession of adequate and valid travel medical insurance to cover any expenses which might arise in connection with repatriation for medical reasons, urgent medical attention and/or emergency hospital treatment or death, during their stay(s) on the territory of the Member States. The insurance shall be valid throughout the territory of the Schengen Area Member States and cover the entire period of the person's intended stay or transit. The minimum coverage shall be EUR 30,000(...)