Hepatitis B Vaccination while on Ocrevus

Hi all
First time poster here. Haven’t got the time to call the MS nurses at the mo but am wondering if anyone knows if those of us on Ocrevus can/can’t/should/shouldn’t have the Hep B Vaccination?
I have been asked to complete a form to accept or decline as part of my new job.
Any advice or points of direction to a source of info would be gratefully appreciated. Thanks!