If an uninfected, unvaccinated person – or anyone who does not know their Hepatitis B status – is exposed to the Hepatitis B virus through contact with infected blood, a timely “post exposure prophylaxis” (PEP) can prevent an infection and subsequent development of a chronic infection or liver disease.
This means a person should seek immediate medical attention to start the Hepatitis B vaccine series.
In some circumstances a drug called “Hepatitis B immune globulin” (HBIG) is recommended in addition to the Hepatitis B vaccine for added protection.