MCQ
$AIDS$ is due to:
- ✓Reduction to number of helper $T-$cells.
- BReduction in number of killer $T-$cells.
- CAutoimmunity.
- DNon-production.
White blood cells are an important part of the immune system. HIV infects and destroys certain white blood cells called $\mathrm{CD}_{4^{+}}$ cells. If too many $\mathrm{CD}_{4^{+}}$ cells are destroyed, the body can no longer defend itself against infection.
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