Question

And what kind of setting can frequent close contact with someone who has hepatitis B cause transmission

Answer 1

Frequent close contact with someone who has hepatitis B can cause transmission in settings such as sharing needles or other drug paraphernalia, receiving medical or dental procedures with equipment that is not properly sterilized, having unprotected sex with an infected individual, sharing personal items like razors or toothbrushes, or being born to a mother who is infected with hepatitis B.