This is Dr. David
sounds like you have been found to be hepatitis B virus positive
which is very common in africa and in asia and is spread commonly in families when food and drink are shared.
I am glad you had an ultrasound and your liver was reported ok.
you need blood liver enzyme testing such as AST, ALT, LDH, Alk phos levels, but most likely these are normal as well.
I am glad you are not having symptoms.
many patients can live with positive hepatitis B for many many years and decades without symptoms.
it would be a good idea for your family members to also get tested for hepatitis B virus as well.
let me know if you have questions.