all i can give you is my personal expereince
I worked in a forst / group home and an emergency shelter and a woman's shelter. DH is FLEO ...
we both have Hep B.
We both got it because
in his job, in the ones i held -- we were in contact with blood, and we were bitten and scratched. not jsut a potentioal, we both knew it would and did happne faily normally. Less so for DH due to his fireld.
and also for me a lot of contact with body fliuds (gloves or no) and my own personaly hapbit of biting my naisl and constantly having open hang nails and the like.
My mom is a RN and she felt strongly we should ge the Hep B -- due to blood contact, or even needle sticks (be it intentally for DH, or accidental for me).
I knwo there are others -- some that mom has, some she does not -- that that point you have to assess actual risk......
DH aslo keeps his tentus current -- as i did when working -- do to potinal injuries (attacks or otherwise).
So of your presonal risk assessment has to consider where you will work, even as a student on rotation.....and what population you will have contact with.
I would howver, and i know some don't, support the Hep B.
but most of it has to be determined based on where you will work and with who and what you actually will do....or what you might be called upon to due even if it is not routine for you