When to use injection in Korean
Korean: 주사[ ju-sa ]

When to use it
The word "주사" means an injection or shot from a doctor or nurse. It is used when someone gets medicine or a vaccine with a needle. You can talk about getting a 주사, needing one, or feeling pain after it.
Example sentences
오늘 병원에서 주사를 맞았어요.
I got an injection at the hospital today.
감기에 걸려서 주사가 필요해요.
I have a cold, so I need an injection.
주사 맞기 전에 조금 무서웠어요.
I was a little scared before getting the injection.
아이가 주사를 무서워해요.
The child is afraid of injections.
집에 와서 주사 맞은 팔이 아팠어요.
When I came home, the arm where I got the injection hurt.
여행 전에 예방 주사를 맞았어요.
I got a vaccine injection before the trip.