How to identify if someone is infected by Hep B?

[Walifesuc]

Could anyone tell me what are earlier symptoms of Hep B?

What are the ways to diagnose the virus? And it's window period?

I have done hbsag Elisa test at 28th day after suspectible event. Now it's 3month which blood test should I do?

Lastly, Liver function test will reveal if someone if infected by hep?

[stef2011]

zero symptoms, you cannot see the infection unless a blood test is made and it is not harmful to adults it become schronic only from other to child at birth when the baby has no immune system.hbsag test is the way to know if someone is infected but this infection is going to be very rare, vaccinations have made it non exsistent on new generations

[stef2011]

few typing errors:  it becomes chronic only from mother to child at birth