This would avoid the risks of rejection that come with transplants from donors.

这将避免捐赠者移植出现排斥的风险。

Immunosuppressive drugs can help manage the risk of rejection, but they also leave patients open to contracting dangerous infections.

免疫抑制药物可以帮助控制排斥反应的风险，但它们也使病人有可能感染危险的疾病。

This is because the human brain is biased to dwell on negative events, but starting conversations with strangers is still well worth the risk of rejection.

这是因为人脑倾向于沉迷于负面事件，但与陌生人开始对话仍然值得冒被拒绝的风险。