Which statement correctly describes a significant difference between HIV and AIDS?

Which statement correctly describes a significant difference between HIV and AIDS?

• A. HIV attacks the body's immune system, while AIDS leaves the body vulnerable to opportunistic infections
• B. HIV transmission is possible during any stage of HIV infection, but is no longer possible once AIDS has developed
• C. HIV can be cured through administration of a combined drug therapy, while AIDS can be controlled but not cured
• D. HIV attacks the organs of the endocrine system, while AIDS reduces the body's ability to regulate homeostasis and the body temperature

Answer: (A)

The key idea is distinguishing HIV as the virus that damages the immune system from AIDS as the advanced stage of HIV infection when the immune system is severely weakened. HIV infects and gradually destroys immune cells, especially CD4 T cells, leading to immune deficiency. AIDS is not a separate pathogen; it’s the condition that develops when the immune system has been so compromised that the body becomes highly vulnerable to opportunistic infections and certain cancers. Because the virus can be present and actively damaging the immune system at any stage, transmission can occur at any point in the infection, including when AIDS has developed. There is no cure for HIV with current therapy, though combination antiretroviral therapy can suppress the virus and keep people healthier for longer; this does not eradicate HIV. The statement that HIV attacks the immune system while AIDS leaves the body vulnerable to opportunistic infections best captures the essential difference.

The key idea is distinguishing HIV as the virus that damages the immune system from AIDS as the advanced stage of HIV infection when the immune system is severely weakened. HIV infects and gradually destroys immune cells, especially CD4 T cells, leading to immune deficiency. AIDS is not a separate pathogen; it’s the condition that develops when the immune system has been so compromised that the body becomes highly vulnerable to opportunistic infections and certain cancers. Because the virus can be present and actively damaging the immune system at any stage, transmission can occur at any point in the infection, including when AIDS has developed. There is no cure for HIV with current therapy, though combination antiretroviral therapy can suppress the virus and keep people healthier for longer; this does not eradicate HIV. The statement that HIV attacks the immune system while AIDS leaves the body vulnerable to opportunistic infections best captures the essential difference.