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Which statement is true concerning AIDS? (1) AIDS is not a single disease but a set of diseases. (2) AIDS occurs when helper T cells fall to a very low level and opportunistic diseases occur. (3) AIDS results from years of damage to the immune system by HIV. (4) AIDS is the main cause of death in the world today.

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Immune system disorders cause abnormally low activity or over activity of the immune system.


Which statement is true concerning AIDS? (1) AIDS is not a single disease but a set of diseases. (2) AIDS occurs when helper T cells fall to a very low level and opportunistic diseases occur. (3) AIDS results from years of damage to the immune system by HIV. (4) AIDS is the main cause of death in the world today.






 
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