The African region experiences a disproportionate burden of public health emergencies, with over 90% linked to infectious diseases. This thesis investigates innovative approaches to epidemic preparedness and response, focusing on Ebola Virus Disease (EVD) and leveraging real-world data from Guinea and the Democratic Republic of Congo (DRC). It evaluates early warning systems, community-driven interventions, and health system reforms to enhance outbreak containment. Key findings include the effectiveness of the Early Warning, Alert, and Response System (EWARS) during the 2018–2020 EVD outbreak in the DRC. This decentralised system demonstrated robust sensitivity, specificity, and rapid investigation capabilities, improving epidemic detection and response. The study further highlights the pivotal role of genomic sequencing and targeted interventions in controlling residual transmission clusters during the outbreak's final stages. Community-based strategies emerged as transformative tools for outbreak management. In Beni and Mabalako, community-led contact isolation achieved a significant reduction in transmission, fostering trust and collaboration through culturally sensitive approaches. These findings underscore the importance of integrating local engagement with technical interventions to achieve rapid epidemic control. The thesis also examines factors influencing the reliability of contact tracing, revealing that socio-demographic characteristics, resource allocation, and community trust are critical determinants. Lessons from Guinea’s 2021 EVD outbreak emphasise the need for tailored strategies that address urban and rural dynamics. An examined case of Lassa fever and COVID-19 coinfection during an EVD outbreak in Guinea underscores the necessity of integrated diagnostic systems to manage overlapping health emergencies effectively. Finally, the thesis also explores the impact of investing in preparedness, with a focus on health system reforms in Guinea following the 2014-2016 EVD epidemic. Investments in decentralised early warning systems, workforce capacity-building, and community engagement yielded substantial improvements in outbreak responsiveness. These reforms enhanced the detection and containment of emerging health threats, highlighting the importance of sustained funding and strategic planning. Ultimately, this research advances the understanding of epidemic preparedness, offering practical insights to strengthen health systems and improve responses in resource-limited settings. The findings contribute to global health security efforts, particularly in regions facing recurrent zoonotic disease threats.