Sir, I am 30yrs old, i went to donate the blood to my sister on 08.01.2011, they told HbsAG is positive. Then immediately i tested the blood checkup and in the report HIV I & II - Negative, HbsAg - Positive, and V.D.R.L - Non- Reactive . Doctor had given me the tablets names tefon 300mg. can u give me the suggestion what precautions should I take.