The overload of health information has been a major challenge during the COVID-19 pandemic. Public health authorities play a primary role in managing this information. However, individuals have to apply critical health literacy to evaluate it. The objective of this paper is to identify targets for strengthening critical health literacy by focusing on the field of argumentation theory. This paper is based on the textual analysis of instances of health information through the lens of argumentation theory. The results show that critical health literacy benefits from: (1) understanding the concept of argument and the supporting reasons, (2) identifying the main argument schemes, and (3) the knowledge and use of the main critical questions to check the soundness of arguments. This study operationalizes the main aspects of critical health literacy. It calls for specific educational and training initiatives in the field. Moreover, it argues in favor of broadening the current educational curricula to empower individuals to engage in informed and quality decision making. Strengthening individuals' critical health literacy involves interventions to empower in argument evaluation. For this purpose, argumentation theory has analytical and normative frameworks that can be adapted within a lay-audience education concept.
Keywords: argumentation theory; critical health literacy; critical thinking; disinformation; health communication; health information; health literacy; information appraisal; misinformation.