Please help a friend.

He has hepatitis B and is already at non reactive stage but the issue is that despite all the treatment he has undergone Dr still told him the surface antigen will always be positive.
Non he got a job in which he has to be tested negative before they can allow him to resume.
Despite all the Dr report to backup his medical they still rejected it.
Please is there anyone that can help or introduce him to what it can take to be test negative within a week.
Thanks as I will really appreciate your contribution towards this topic.