Hep b

I want to bring my cousin here on visit visa and then may be find a job and transfer to work visa. But my cousin has hep b. So will it be possible?

1- Visit visa cannot be transferred to work visa. Has to leave and come back if he finds a job and the employer is willing to issue sponsorship.
2- What I know is that they screen for hep. C but I'm not sure whether they deny visa for hep. B carriers. In all cases if your cousin is still carrying hep. B virus it's better he stay there till he completely finishes treatment. It's only a matter of 2 months or so. You (both of you) have a moral responsibility to keep the condition contained and not spread it to others.

excellent advice JFU.

plus, from another PoV, check to see if you can bring your cousin on visit visa -  depends on your salary etc.