PPIB and hepatitis B virus infection: Most nurses know of post exposure prophylaxis (PEP) but concerning hepatitis B specifically, only 9.3% know that hepatitis B vaccine is used as prophylaxis and only 3 persons mentioned hepatitis B immunoglobulin (HBIG) which is sometimes given together with the hepatitis B vaccine as PEP- a demonstration of inadequate knowledge in PEP for hepatitis B virus infection.