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What is Acquired Immunodeficiency Disease (AIDS) caused by?

  1. A viral infection affecting the respiratory system

  2. The HIV virus affecting the body's ability to fight infection

  3. A genetic disorder that weakens the immune system

  4. A bacterial infection impacting digestion

The correct answer is: The HIV virus affecting the body's ability to fight infection

AIDS (Acquired Immunodeficiency Syndrome) is caused by the Human Immunodeficiency Virus (HIV), which specifically targets and weakens the immune system. This virus primarily attacks CD4 cells, also known as T cells, which play a critical role in the body’s ability to fight off infections. As the virus replicates and destroys these immune cells, the individual becomes increasingly susceptible to opportunistic infections and certain cancers, which are indicative of the progression from HIV to AIDS. Understanding that HIV is a viral infection that directly impacts the immune system is essential in the context of preventive care and treatment strategies. Unlike other infections or disorders mentioned in the options, AIDS is not related to respiratory issues, genetic disorders, or bacterial infections. This clear distinction highlights the unique nature of HIV/AIDS and underscores the importance of virus-specific treatments and interventions in managing the disease.