Part Ⅰ Introduction 1 Introduction of Influenza A (H1N1) 2 Etiology of Influenza A (H1N1) 3 Epidemiology of Influenza A (H1N1) 4 Pathogenesis and Pathological Changes 5 Clinical Manifestations 6 Laboratory Tests and Special Tests 7 Pulmonary Function Tests and Blood Gas Analysis 8 Clinical Diagnosis Part Ⅱ Diagnostic Imaging of Influenza A (H1N1) 9 Techniques of Diagnostic Imaging 10 Diagnostic Imaging of Nervous System 11 Diagnostic Imaging of Chest 12 Diagnostic Imaging of Abdomen 13 Differential Diagnostic Imaging Part Ⅲ Treatment and Care of Influenza A (H1N1) 14 Treatments 15 Diagnosis, Treatment and Control of Influenza A (H1N1) by Traditional Chinese Medicine (TCM) 16 Clinical Care of Patients with Influenza A (H1NI) Part Ⅳ Prevention and Control of Influenza A (H1N1) 17 Prevention and Control Appendices Index