patient zero
noun/ˌpeɪʃnt ˈzɪərəʊ/
/ˌpeɪʃnt ˈzɪrəʊ/
[singular] usually used without a (especially US English)- the first person to be infected by a particular disease
第一个感染特定疾病的人 - The authorities have so far been unable to trace patient zero.
到目前为止，当局还无法追踪到零号病人。
- The authorities have so far been unable to trace patient zero.