This bloodborne virus is transmitted primarily through sexual contact or sharing contaminated needles. What strain is this describing?

The virus being described primarily transmits through sexual contact and sharing contaminated needles is Hepatitis B. This strain is a significant public health concern due to its modes of transmission, which include not only sexual activity but also exposure to infected bodily fluids, such as blood. Hepatitis B can lead to chronic liver disease and has specific vaccination measures due to its infectious nature.

In the context of the other viruses mentioned, while Hepatitis C also transmits through sharing contaminated needles and is associated with blood, its primary transmission methods are more focused on parenteral routes rather than sexual contact. Hepatitis A is primarily transmitted through the fecal-oral route and is not associated with chronic liver disease, distinguishing it sharply from Hepatitis B. Human Immunodeficiency Virus (HIV) does transmit through sexual contact and contaminated needles, but it is specifically known for leading to acquired immunodeficiency syndrome (AIDS), which is a different disease process than that related to Hepatitis viruses. Understanding these distinctions is crucial in the context of transmission routes and potential chronic health implications.