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Welcome to eGyanKosh’s Unit-4 on Introduction to Epidemiology! This comprehensive study material is designed to enhance your understanding of epidemiological approaches and processes, essential for aspiring health professionals and students alike. Offered by IGNOU for the year 2025, this resource provides valuable insights into the principles and methodologies that shape public health research and practices. Whether you’re looking to broaden your knowledge or prepare for your assessments, you can easily access and download this free study material, unlocking a pathway to a deeper comprehension of epidemiology. Dive into the dynamic world of disease patterns, health determinants, and research techniques that will equip you with the tools necessary to make informed decisions in the field of healthcare.