Comprehensive, thoroughly revised book based on competency-based curriculum by the National Medical Commission. Content is written keeping in mind perspectives of both UG and PG students of MBBS, MD (PSM), DNB (PSM), MPH/DPH and other allied health disciplines? students. New chapter on Case Based Discussion added in this edition which would be highly beneficial in practical exams. New topics on Advanced Biostatistics along with some new topics like Systematic Review, Qualitative Research, Tribal Health, Adult Immunization, Recent Reforms in Medical Education, Pedagogy, Hospital Associated Infection, Antibiotic Resistance, IPHS Standards (2022), Disaster Management, National and International Health Agencies, etc. have been added to make this edition a complete solution. Ideal for last-minute revision and comprehensive exam readiness. The basket of Spots, Logos and Images expanded for better understanding. Self practice exercises have been incorporated for self-assessment and exam preparate. Highlighted in separate boxes for quick reference and deeper insights. Dedicated Chapter on Communicable Diseases added for quick read. Key points crucial for examination, often queried in exams are given in a summarized form in each chapter for efficient last-minute revision. It is written by keeping in mind the perspectives of both undergraduate (UG) and postgraduate (PG) students and in accordance with the Competency-Based Medical Education curriculum recommended by the National Medical Commission. Continuing the legacy of previous editions, this edition presented the complexity of the subject in a student friendly manner to make the revision of the course easier and quicker. Authors include information pertaining to both theory and practical aspects.The unique chapter added for the first time in this edition is the Case Based Discussion, which will help students perform -better during practical examination. Scenarios for self-practice have also been included. An innovatively crafted and dedicated chapter on the Basics of Important Communicable Diseases has been added to make learning easier and practical aspects. This edition is also going to help all the faculty in their day-to-day teaching and in preparing for competitive examinations as well.