What is the primary mode of transmission for Hepatitis B?

Hepatitis B virus (HBV) is primarily transmitted through blood and bodily fluids, which includes semen, vaginal secretions, and other fluids containing the virus. This transmission can occur through activities such as unprotected sexual contact, sharing needles or syringes, and from mother to child during childbirth. Because hepatitis B can survive outside the body for at least seven days, even small amounts of blood can pose a risk of transmission.

Understanding the primary mode of transmission is critical for implementing effective preventive measures, such as vaccination and safe practices in healthcare and personal settings, to reduce the spread of the virus. The other options listed do not accurately represent the main ways that Hepatitis B is spread; for instance, airborne transmission is not relevant to HBV, nor is transmission via casual contact or insect bites. This information underscores the importance of focusing on bloodborne routes in the context of hepatitis B infection prevention.