The interconnectedness of modern societies and global mobility has amplified the risk of infectious disease outbreaks escalating into pandemics. Global health security involves proactive efforts to detect, prevent, and respond to emerging health threats before they become widespread crises. Historical pandemics like the Black Death and the Spanish flu highlight the catastrophic consequences of uncontained outbreaks. Despite advancements in healthcare infrastructure, the COVID-19 pandemic has exposed gaps in preparedness, emphasizing the need for enhanced global surveillance, cross-sectoral collaboration, and technological innovations. This paper explores the historical context of pandemics, key components of pandemic preparedness, and the role of global coordination and technology in mitigating future health threats. It calls for stronger international collaboration and investment in healthcare systems to ensure resilience in the face of future pandemics. Keywords: Global health security, pandemic preparedness, pandemic response, historical pandemics, COVID-19, global surveillance.