A notifiable disease or a notifiable crime is one that the law says you must report to the government or the police. The word does not mean “you may tell people if you like”. It means you have to.

A notifiable disease or a notifiable crime一個 notifiable 的疾病或罪行， is one that the law says是法律規定 you must report你必須通報 to the government or the police給政府或警方的。The word does not mean這個字的意思不是 “you may tell people if you like”「你高興的話可以講給別人聽」， It means它的意思是 you have to「你一定要」。

Doctors, hospitals, and labs use it for illnesses that the health office needs to know about so they can stop a spread. Law people use it for offences that must be reported.

Doctors, hospitals, and labs醫生、醫院、化驗室 use it for illnesses用這個字來指疾病， that the health office needs to know about衛生單位需要知道的， so they can stop a spread好阻止疫情擴散。Law people法律界的人 use it for offences用這個字來指罪行 that must be reported必須通報的。

You will not hear it in everyday chat about a cold; it belongs to official forms, news, and public-health talk, and it feels formal.

You will not hear it你不會聽到這個字 in everyday chat about a cold出現在講感冒的日常閒聊裡； it belongs to official forms, news, and public-health talk它屬於官方表格、新聞、公共衛生的用語， and it feels formal感覺很正式。

Though actually, what counts as notifiable changes with each country’s rules and with the year, so the adjective is about the legal duty, not about how serious the illness feels to you personally. A mild case can still be notifiable if it is on the list.

Though actually不過其實， what counts as notifiable什麼算是 notifiable changes with each country's rules會隨各國的規定 and with the year也隨年代而不同， so the adjective is about the legal duty所以這個形容詞講的是法律上的義務， not about how serious the illness feels to you personally不是你自己覺得這個病有多嚴重。A mild case輕微的病例 if it is on the list只要它在通報名單上 can still be notifiable還是可能算是 notifiable。