你可以咁講:
"I need to take the Hepatitis-A vaccination jab by mid-February, but I'm not too sure in which clinic I can take it. Would you be able to find out for me where I may find this service and give me the address of the clinic, so that I can take the injection as soon as possible?"
You can tell your teacher in this simple way:
I must have an injection of hepatitis type A (甲型肝炎) mid Februray, but I do not know where I can have it. Please give me the address of a clinic which provides such injection. Thanks.
Hope this helps!
2008-01-27 22:24:35 補充:
by (or before) mid February