noun
symptomatic person; person with symptoms
Medical term used in contexts such as infectious disease reporting, clinical descriptions, and public health. Refers to a person who is showing symptoms, as opposed to an asymptomatic carrier.
有症者は速やかに医療機関を受診してください。
Symptomatic persons should promptly visit a medical institution.
この調査では、有症者と無症候性キャリアの割合を比較した。
In this study, the proportions of symptomatic persons and asymptomatic carriers were compared.
Means 'infected person', regardless of symptoms. 有症者 specifically emphasizes the presence of symptoms.
Compound of 有 (yuu, 'have') + 症 (shou, 'symptom') + 者 (sha, 'person'). A modern medical coinage, likely modeled on similar terms like 感染者 (kansensha, 'infected person').