Biology, asked by drnakha, 2 months ago

pls find the answer!! pls
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Answered by rupaaalwani

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because those it infects are infected for life with a virus that targets their immune system - making them more prone to other infections. The virus kills immune T helper cells called CD4+ cells, which are the coordinators of the human immune system that's why it is difficult to develop vaccines for some diseases.

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