Prophylaxis is a treatment you have so that you do not get sick, or so that a sickness does not come back — not a treatment you have because you are already ill. Doctors use it for medicine, injections, or a planned course of care given in advance.

Prophylaxis預防性治療 is a treatment you have是一種你接受的治療 so that you do not get sick目的是讓你不會生病 or so that a sickness does not come back或是讓病不會再復發 not a treatment you have because you are already ill不是因為你已經生病了才接受的治療 Doctors醫生 use it用這個詞 for medicine, injections, or a planned course of care given in advance來指藥物、注射，或是事先安排好的一套療程

Pills before a trip to stop malaria, medicine after an operation to stop infection, or a dentist's cleaning to keep gum trouble away can all be prophylaxis.

Pills before a trip to stop malaria出發前吃來預防瘧疾的藥 medicine after an operation to stop infection手術後用來預防感染的藥 or a dentist's cleaning to keep gum trouble away或是牙醫用來預防牙齦問題的洗牙 can all be prophylaxis都可以算是預防性治療

Though actually, the tidy idea is prevention, but in hospitals the word is narrower than eat well and sleep. It means a planned medical step against a known risk. It is a doctor's word.

Though actually不過其實 the tidy idea is prevention簡單來說這個概念就是「預防」 but in hospitals the word is narrower than eat well and sleep但在醫院裡這個詞的意思比「吃好睡好」要窄得多 It它 means指的是 a planned medical step一個事先安排好的醫療措施 against a known risk針對已知的風險 It它 is a doctor's word是醫生用的詞

Ordinary people say to prevent or they name the treatment. You may also meet prophylactic for the same idea; in some places that word also means a condom, but prophylaxis itself stays in the medical register.

Ordinary people一般人 say to prevent會說「預防」 or they name the treatment或直接說出治療的名稱 You may also meet prophylactic你也可能會遇到 prophylactic 這個字 for the same idea表達同樣的概念 in some places that word also means a condom在某些地方這個字也指保險套 but prophylaxis itself stays in the medical register但 prophylaxis 本身仍然是醫學用語