This book provides a comprehensive overview of key themes in international public health. It explores how globalization influences health policy, highlighting both opportunities-such as shared medical knowledge and international partnerships-and challenges like disease spread and health inequalities. It discusses global health governance, diplomacy, and cooperation, emphasizing multilateralism, health equity, and shared responsibility. The text outlines major global health challenges, including infectious diseases, non-communicable diseases (NCDs), climate change, antimicrobial resistance, and health disparities. Key strategies discussed include strengthening health systems, promoting equity, investing in innovation, and ensuring epidemic preparedness. It also covers the intersection of international trade and health, health financing and aid, the role of partnerships, and monitoring and evaluation practices. Communication strategies, health promotion, education, and social marketing are explored as vital tools for effective public health interventions. Finally, the document stresses the importance of ethics and human rights in advancing global health equity.