This paper reflects on International Law in the face of the COVID-19 (coronavirus disease 2019) viral pandemic. First, the article examines the role of International Law against the pandemic, focusing mainly on the regulatory framework available to the World Health Organization (WHO). Then, based on the examination of the stance of some States before the pandemic and the action of the WHO, the text points out evidence that the current geopolitical conjuncture still holds national sovereignty as a maxim. Further, the document explains how maintaining the primacy of sovereignty is not an adequate strategy to deal with contemporary times' global challenges. Finally, the article highlights the relevance of assuming a systemic perspective in the practice of contemporary International Law, which, despite its flaws, should still be used as an instrument for peace and international cooperation.