In the battle against COVID-19, millions of European citizens entrust Covid-apps with their sensitive personal data. To what extent may the right to data protection be limited in the light of a health crisis and which role does the EU play in this matter? In her article in Ars Aequi, Hannah van Kolfschooten, PhD-candidate at the Law Centre for Health & Life argues that the right to data protection is not protected in the same way and to the same extent by all European Member States during health crises. A high and equal level of data protection for every EU citizen is therefore on edge.