発症

• 読み: はっしょう
• ローマ字: hasshou
• 漢字の分解: 発 (hatsu) — emit, produce, start; 症 (shou) — symptom, condition
• 発音: /haɕ.ɕoː/

意味

Onset of an illness; outbreak of symptoms. The point at which a disease first manifests.

A noun and suru-verb describing the moment when symptoms of a disease first appear. Used both transitively (a disease causes onset) and intransitively (symptoms develop). Common in medical reporting and health discussions — 発症する (to develop/manifest) is the standard verb form. Distinguished from 発病 (hatsubyou), which emphasises contracting the disease itself rather than the appearance of symptoms.

例文

1. インフルエンザは感染してから発症するまで数日かかる。
2. 母はアレルギーを急に発症した。
3. 発症から治療開始までの時間が回復に影響する。

使い方ガイド

場面: medical, news, health discussions

トーン: serious

起源と歴史

From Sino-Japanese: 発 (hatsu, emit/produce) + 症 (shou, symptom/condition). Literally 'producing symptoms' — the emergence of disease signs.

文化的背景

時代: Modern

世代: All ages

社会的背景: Universal