Which one of the following statements is correct with respect to AIDS?
Correct answer: D. The causative HIV retrovirus enters helper T-lymphocytes, thus reducing their numbers.
- A. HIV can be transmitted through eating food together with an infected person.
- B. Drug addicts are least susceptible to infection.
- C. AIDS patients are being fully cured cent percent with proper care and nutrition.
- D. The causative HIV retrovirus enters helper T-lymphocytes, thus reducing their numbers.
Explanation
HIV is a retrovirus that infects helper T-lymphocytes (CD4⁺ cells), which are essential for coordinating the immune system. The virus binds to CD4 receptors and enters the cell, where it converts its RNA into DNA and integrates it into the host's genome. As HIV multiplies, it destroys the T-cells, leading to a gradual decline in their numbers. With fewer helper T-lymphocytes, the immune system becomes weaker and less able to fight infections, eventually resulting in AIDS.
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