Health Communication in the Age of Platforms: Drivers of Misinformation and the Crisis of Medical Expertise

Misinformation has emerged as a significant threat to both society and public health, with social media acting as a major conduit for its dissemination. This contributes to harmful health outcomes and undermines trust in authoritative institutions. In addition, the dismantling of scientific authority seems to be a symptom of the post-truth era, where “alternative facts” are presented in the public debate as indisputable evidence of the inherent limitations of scientific infallibility. The prevalence of misinformation on social media platforms stems from multiple, interconnected factors, including individual-level influences such as cognitive biases, as well as systemic aspects of social media’s information architecture. Unlike scientific institutions that adhere to the principles of evidence-based knowledge, social media platforms operate under an attention-driven model that favors virality over factuality. Addressing these challenges effectively requires coordinated, multi-level, and multidisciplinary interventions targeting users, content creators, technology companies, health authorities, and governments to restore public trust and safeguard the credibility of medical expertise.