The field of asthma has expanded in the last decade with specific drugs targeting the disease mechanisms. This book is an updated treatise covering diagnoses, phenotypes and endotypes of asthma along with its management. It includes diagnostic work-up which is required prior to medical assistance and basic immunology assessment, illustrating the types, severity, number of exacerbations due to disease activity, allergy or infections. As the treatment selection has changed from one size fits all to precision-based medicine, it aims to refine asthma management with right medication usage, neither overuse nor underuse, and initiation of the new hospital administered biologic drugs. **Key Features** • Covers both respiratory physiology and airway inflammation • Highlights the use of biologic drugs • Discusses precision-based medicine • Explores the comorbidities through clinical cases