25 yr old medical student is injured by needle stick while drawing blood from a patient with chronic hepatitis B. The student received his final vaccination of the series 7yrs ago. The student had his titres checked before clinical rotations 6 months ago and was found positive for anti- hepatitis surface B antigen antibodies(HbsAb).Which of the following will be the next step of mangement of this patient.?
a) Hepatits B immunoglobulin (HBIG) now
b) Hepatitis B vaccination
c) Serological testing for HBsAg