<s>[INST] WHEN I WENT BLOOD DONATE TO MY SISTER THEY FOUND HEPITITES B POSITIVE THAT IS ON LAST YEAR TO ME what i have to do now hbs -ag positive after that i consulted to doctor no thing effected to me,teatment not advised to me doctor told that it's not affected to your body so,need not to tretment [/INST] hepatitis b is sexually transmitted and by blood so take precautions so that you dont transmit that keep the liver function profile done every 6 months </s>