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1. Oxford Dictionary

   patient zero

   • n.
     used to refer to the person identified as the first carrier of a communicable disease in an outbreak of related cases

   • noun: patient zero, plural noun: patient zeros

2. • 釋義

   n.

   名詞

   • 1. US used to refer to the person identified as the first carrier of a communicable disease in an outbreak of related cases patient zero for the outbreak was suspected to be a 2-year-old boy epidemiologists know who Patient Zero is, and they have him in isolation