I'm surprised to know the concept is unknown to you. This is a matter known to the whole world.
Also, hepatitis B is a treatable disease, detectable at an early stage and avoidable by vaccine. I'm sorry to hear about your brother.
I'm a Muslim and I know this could be illegal in some Islamic states although I've not done any background research on that.
If you read my post, you see that there are eight states in the world where this is legal.