patient zero

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释义
首例病例，第一感染源；零号病人
The first person to exhibit symptoms of an illness.

例句
Max: Come on out, patient-zero-friends. I need you to enter your Netflix password.(2 Broke Girls)
麦克斯：出来吧，第一感染源病友，我需要你输入你的网飞视频网密码。（破产姐妹）