Final answer:
Hepatitis B (HBV) is the most common hepatitis virus transmitted by blood and body fluids. It can be spread through exposure to infectious blood or body fluids and is not transmitted through casual contact.
Step-by-step explanation:
The most common hepatitis virus that is primarily transmitted by blood and body fluids is Hepatitis B (HBV).
Hepatitis B is a DNA enveloped virus that can be transmitted through exposure to infectious blood or body fluids such as semen or saliva. It can be spread through skin puncture, across the placenta, or through mucosal contact, but it is not spread through casual contact. Health-care workers, intravenous drug users, and individuals who have sex with multiple partners are at a higher risk of infection.
Vaccination against Hepatitis B is available and is recommended for children and adults at greater risk.