You are covered for your trips as long as your Student Visa is valid under the following conditions :
Cap Student for Europe ( in addition to the European Health Insurance Card ):
You are covered for all your holiday trips to Europe under the same conditions as in your country of study or training . (If you leave Europe contact us, we have solutions)
Cap Student Worldwide (care of medical expenses from the 1st euro ) :
You are covered for all your holiday trips regardless of destination.
This answer only relates to: Cap Student.