The rapid advances in biosensing technology over the past few decades have revolutionized the field of human health. From early disease detection to personalized medicine, these technologies offer unprecedented opportunities to improve patient outcomes and overall public health. This book provides a comprehensive overview of the current state of biosensing technologies, their applications and future prospects. Initially, the book explores the fundamental principles underlying biosensing technology then details various types of biosensors, including electrochemical sensors, discussing their mechanisms, advantages and limitations. The subsequent sections of the book are dedicated to the practical applications of biosensing technologies in human health including infectious disease diagnostics, environmental monitoring and the development of wearable biosensors for continuous health monitoring. These chapters highlight real-world examples and case studies, illustrating the impact of biosensing technology on healthcare practices. This book is a crucial resource for academics, researchers, and those who want to learn more about electrochemical phenomena, experiment with cutting-edge methods and use biosensors for a variety of purposes.