HIV is a retrovirus that selectively attacks the CD4+ T lymphocytes, the
immune cells responsible for coordinating the immune response to
infection. Because of this, people with HIV infection are more susceptible
to severe infections with ordinarily harmless organisms.
define innate immunity
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Innate immunity, also called natural immunity, is the first line of defense.
This type of defense is in place before an infection takes place and can
function immediately. It is comprised of physical, chemical, cellular, and
molecular defenses.
What is autoreactivity?
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describes an organism acting against its own tissue
What are antigens?
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