To Google! Chaaarge!

You could get hepatitis B from

being born to a mother with hepatitis B
having sex with an infected person
being tattooed or pierced with unsterilized tools that were used on an infected person
getting an accidental needle stick with a needle that was used on an infected person
using an infected person’s razor or toothbrush
sharing drug needles with an infected person

http://digestive.niddk.nih.gov/ddise...ubs/hepb_ez/#5