<s>[INST] Hi, I got spills of blood last time when I inserted an IV line last September 7, 2012 ! I found out that the patient is HbsAg REACTIVE! I got a Hep Vaccine last 2004 and only got 2 doses! In 2008, I checked my Anti Hbs result and reactive result of >500mIU and last November 2011 my anti Hbs result is the same! Thanks! [/INST] Thanks for your query at Chat Doctor! I am Infectious Disease Specialist! I went through your query! Your patient is Bag positive that he is suffering from acute/chronic hepatitis and has viral antigens in blood. When a person gets vaccinated they get antibodies developed. It is successful if the antibody-titer (antics) is higher than 100 IU/L. So there is no problem with you these are protective antibodies. You can get tested for Bag antigen to clear doubt which is negative in vaccinated individuals. Fortunately, there are effective vaccines against the virus, which are about 95% effective. Happy to take more queries! You can also write a review for me. If you would like some more information, I will be happy to provide. Take care! </s>