While immunosuppressive drugs can help prevent rejection of transplanted tissues or organs, they can also give rise to infections.免疫抑制药物可以帮助防止移植器官或组织被身体排斥，但是它们也会引起感染增加。High levels of immunosuppression are needed to prevent rejection of transplanted tissue or organs.需要高强度的免疫抑制来防止对移植器官或组织的排斥。Since an autograft is used, no immunosuppression is necessary.既然用的是自体移植物，就没有必要进行免疫抑制了。