What is the primary mode of transmission for Hepatitis B?

The primary mode of transmission for Hepatitis B is through sexual contact and blood. Hepatitis B virus (HBV) is primarily spread through exposure to infectious body fluids, particularly blood. This can occur through sexual activity, sharing of needles or syringes, and from mother to child during childbirth. The virus can also be present in other bodily fluids such as saliva and semen, but the significant routes of transmission are through direct blood contact and unprotected sexual intercourse with an infected person.

In contrast, the fecal-oral route, which typically conveys viruses like Hepatitis A, is not a route for Hepatitis B. Aerosol droplets usually pertain to respiratory viruses and infections like the flu or COVID-19, and insect bites are more commonly associated with viruses like dengue or Zika, but not with Hepatitis B. Understanding these modes of transmission is crucial for prevention and control measures, particularly in healthcare settings and among populations at risk.