Purpose and requirement o To understand the etiology, pathogenesis and pathology To master the clinical manifestations(common case severe case and atypical case), diagnosis and treatment To understand the differential diagnosis and prognosisPurpose and requirement ❖ To understand the etiology, pathogenesis and pathology ❖ To master the clinical manifestations (common case, severe case and atypical case), diagnosis and treatment ❖ To understand the differential diagnosis and prognosis