ABSTRACT
The COVID-19 crisis, which radically changed all the habits of humanity, started a new era in relations between European states. The European states and the EU institutions, working in the light of the principles of solidarity and cooperation since the Second World War, suffered greatly with this health crisis. This period, which resulted in the diminishing of cooperation and their states to pay more attention to their national interests, faltered in European solidarity. At this point, the study will address the problems experienced in the economic, political, and health fields. In addition, in the light of these problems, the course of the relations between the European Union states in the post-COVID-19 period will be discussed. © 2022 by World Scientific Publishing Europe Ltd.