The researchers said both methods greatly reduced the risk of H. I. V. infection.

研究人员说，这两种方法都大大降低了艾滋病毒的感染风险。

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The researchers said both methods greatly reduced the risk of H. I. V. infection.

研究人员说，这两种方法都大大降低了艾滋病毒的感染风险。

youdao