Infectious diseases is a science that studies the occurrence, development, transmission, prevention and control of infectious and parasitic diseases in the internal and external environment of the human body. Its task is to enable students to master the theoretical knowledge and skills of the pathogenesis, clinical manifestations, diagnosis and prevention of various infectious and parasitic diseases through teaching. At the same time, they are familiar with the preventive measures by understanding their epidemiological characteristics. Lay a foundation for engaging in clinical infectious diseases and learning other clinical medicine courses.