Once HbSAg positive, needs regular follow up every 6 months with your
liver function tests and ultrasound, consultation with physician or gastroenterologist. Follow strictly barrier contraception and avoid blood donation to avoid transmission to your partner or others. Also when ever you visit any lab or hospital kindly update them with this information so that they take steps to avoid transmission or contamination to others .
HbSAg is transmitted through blood and is also
STD , not transmitted by touch or food ..
If regular precautions taken it is not so dangerous like many other diseases.
Good luck.