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Definition of patient zero noun from the Oxford Advanced Learner's Dictionary

patient zero

noun
 
/ˌpeɪʃnt ˈzɪərəʊ/
 
/ˌpeɪʃnt ˈzɪrəʊ/
 [singular] usually used without a (especially US English)
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  1. the first person to be infected with a particular disease
    • The authorities have so far been unable to trace patient zero.
    Topics Health problemsc2
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Nearby words

influence
verb
 
 
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