The virus that causes AIDS, and is spread from person to person through blood and through other body fluids such as semen and vaginal secretions.

• A. Hepatitis A
• B. Herpes
• C. Influenza
• D. HIV

Answer: (D)

HIV is the virus that causes AIDS and is transmitted through blood and certain body fluids, such as semen and vaginal secretions. In salon safety, this means treating blood and bodily fluids as potentially infectious and using universal precautions—gloves when handling blood, proper instrument sterilization, and safe disposal of contaminated items. The other viruses don’t fit this transmission pattern: Hepatitis A spreads mainly through the fecal–oral route; herpes spreads primarily via skin-to-skin contact or contact with lesions; influenza spreads through respiratory droplets. So HIV is the correct choice because it matches the described mode of transmission.