Hi doctor. Please try to sort this one out for me.in2006 I received three doses of hepatitis b vaccine. Later in 2009,i had a needle stick injury and my hbsab was checked.the titers were around 800..after completing my HIV prophylaxis, I had a full hepatitis screen. And was non reactive to all. The nurse advised me to repeat the vaccine. After two doses ibecame pregnant. My doctor told me not to go for the third since it might not be safe.he ordered a hepatitis b test which am not sure about but the results were reactive. He explained that it was okaysince I had toldhim I had received the vaccine. Two years now after the vaccine, I checked my antibodies and was surprised. Hbsab reactive with titers over 1000.I have read that the titers are high after vaccine and lower with time.please help me understand why my titers are so high. Thank you