Exposure to infected blood
Unprotected sex with someone who has hepatitis B
Sharing needles, syringes, or other drug-injection equipment
Needlestick injuries from contaminated sharps
From mother to baby during childbirth
Sharing items contaminated with blood, such as razors or toothbrushes
Direct contact with open cuts or sores from an infected person
Exposure to contaminated medical or dental equipment if improperly sterilized
Human bites that break the skin and involve blood exposure