Objective: Observing the effect of SACR on pulmonary pathological change and ultrastructure of mice infected by influenza virus type A.Methods: Use nasal inoculation to establish mouse pulmonary infection model animals by A-type influenza virus.The animals were divided into normal group,model group,ribavirin group and SACR group.After 7 days of lavaging drug or normal saline,dispose mice and detect pulmonary weight index routine;Observing pulmonary pathological change and ultrastructure by light microscope and transmission electron microscope...