Certified Nursing Assistant (CNA) Practice Exam

The correct choice highlights that the most prevalent means of transmitting Hepatitis B Virus (HBV) and Human Immunodeficiency Virus (HIV) is through unprotected sexual intercourse. This refers to sexual activities that do not involve the use of barrier methods, such as condoms, which significantly reduce the risk of transmission for these infections.

Unprotected intercourse exposes individuals to bodily fluids that may carry these viruses, increasing the likelihood of infection. Both HBV and HIV can be present in blood, semen, vaginal fluids, and breast milk, making unprotected sexual activities a primary route for their transmission.

While anal and oral intercourse can also transmit these viruses, the overall risk of transmission during unprotected sexual activity encompasses all types of intercourse, thereby making it the most common method through which these infections are spread. Protected intercourse, which involves the use of condoms or other barriers, greatly decreases the risk of transmission and is considered a preventive measure against these diseases.