Human Immunodeficiency Virus HIV

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A virus responsible for the condition known as aids, that affects the way in which the immune system can effectively deal with foreign microbes invading the body by depleting the its ability to produce the relevant antibodies.This is caused by the hiv virus attaching itself to lymphocytes, the body's main second line of defence, where it reduces the ability to produce effective antibodies as a means of defence against opportunistic infections.