Manny has contracted a virus that is destroying his body's immune system. Manny most likely has:

• A. Hepatitis B virus infection
• B. Prion disease
• C. Viroid infection
• D. Human Immunodeficiency Virus (HIV) infection

Answer: (D)

Verified step by step guidance

1. Step 1: Understand the problem context. The question describes a virus that destroys the body's immune system, which is a key clue to identifying the correct infection.
2. Step 2: Review the options given: Hepatitis B virus infection, Prion disease, Viroid infection, and the correct answer, Human Immunodeficiency Virus (HIV) infection.
3. Step 3: Recall that Hepatitis B virus primarily affects the liver, not the immune system directly; Prion diseases are caused by misfolded proteins and affect the nervous system; Viroids are infectious RNA molecules that affect plants, not humans.
4. Step 4: Recognize that HIV specifically targets and destroys CD4+ T cells, which are crucial components of the immune system, leading to immune system failure.
5. Step 5: Conclude that the virus destroying the immune system in this context is HIV, which causes Acquired Immunodeficiency Syndrome (AIDS).