The Asthma Preventive ecosystem comprises a defined chain of activities that transform raw inputs into clinically approved preventive therapies and delivery devices for patients. Upstream, raw material and component suppliers furnish active pharmaceutical ingredients (APIs), excipients, and inhaler parts. Midstream participants—including pharmaceutical manufacturers, device OEMs, and system integrators—combine these inputs, conduct formulation, assemble devices, and secure regulatory clearance. Downstream, distributors, pharmacy chains, and healthcare providers deliver the finished products to end‑users while insurers and public health programs influence adoption through reimbursement policies. Value is created through R&D, manufacturing efficiency, regulatory compliance, and clinical adoption, and is captured by each tier through product margins, service contracts, and reimbursement reimbursements.