UCU 101: HIV/Aids Notes
Institution: University
Course: Bachelor of Science in Mathematics and Computer Science
Content Category: University Schemes of Work
Posted By: Marielle lovey
Document Type: PDF
Number of Pages: 66
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Summary
INTRODUCTION
- People have been warned about HIV and AIDS for over twenty years now.
- AIDS has already killed millions of people, millions more continue to become infected
with HIV, and there's no cure - so AIDS will be around for a while yet.
- However, some of us still don't know exactly what HIV and AIDS actually are
- HIV is a virus.
- Viruses infect the cells of living organisms and replicate (make new copies of
themselves) within those cells.
- A virus can damage the cells it replicates in, which is one of the things that can make
an infected creature become ill.
- Different viruses attack different parts of the body - some may attack the skin, others
the lungs, and so on.
- What makes HIV so dangerous is that it attacks the immune system itself - the very
thing that would normally get rid of a virus.
- It particularly attacks a special type of immune system cell known as a CD4
lymphocyte.
- And on top of this, HIV has a number of tricks that help it to evade the body's
defences, including very rapid mutation. This means that once HIV has taken hold,
the immune system can never fully get rid of it.
- People can become infected with HIV from other people who already have it, and
when they are infected they can then go on to infect other people. Basically, this is
how HIV is spread.
- HIV stands for the 'Human Immunodeficiency Virus'. Someone who is infected
with HIV is said to be 'HIV+' or 'HIV positive'.
- A damaged immune system is not only more vulnerable to HIV, but also to the attacks
of other infections. It won't always have the strength to fight off things that wouldn't
have bothered it before.
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