influenza
influenza — 名詞
1. a common viral infection that affects the breathing system, causing symptoms suc
流感
流行性感冒的正式名稱
a common viral infection that affects the breathing system, causing symptoms such as fever, body aches, sore throat, and tiredness — the more formal word for 'flu'
Nala caught influenza during the winter and stayed home from school for a week.
Nala 冬天得了流感，在家休息了一週沒去上學。
collocation: caught / contracted + influenza
The doctor warned that influenza can be serious for elderly patients with weak immune systems.
醫生警告說，免疫力較弱的年長病人感染流感可能會有嚴重後果。
influenza + can be serious for [vulnerable group]
A free vaccine against seasonal influenza is available at local clinics every autumn.
每年秋天，當地診所都會提供免費的季節性流感疫苗。
Caio missed two weeks of work after coming down with a severe case of influenza.
Caio 得了嚴重的流感，因此兩週沒去上班。
Lotte's grandmother received an influenza shot before travelling overseas last November.
Lotte 的祖母去年十一月出國前打了流感疫苗。
- flu
the everyday short form, used in speaking and informal writing
用法筆記
More formal than 'flu'. In everyday speech and informal writing, 'flu' is the usual word. 'Influenza' is used in medical contexts, official health announcements, and academic or formal writing.