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Biology Research. Summary of AIDS and how it is transmitted.

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AIDS (Acquired immune deficiency syndrome) Intro * Aids is caused by HIV (Human immunodeficiency virus), as HIV damages the immune cells, the body becomes more vulnerable to infections, which it will have difficulty in fighting off. It is at the point of very advanced HIV infection that a person is said to have AIDS. It can be years before HIV has damaged the immune system enough for AIDS to develop. Structure * HIV particles are 0.1 microns in diameter and can only be seen through an electron microscope. * They have a lipid coat covering them and 72 spikes project from this, which are formed from proteins. ...read more.


* Maturation o Among the mRNA are copies of the HIV genes. This combine which the HIV proteins to form new virus particles. o The process keeps repeating as newly created HIV particles infect new cells. Infection * HIV is spread through the exchange of bodily fluids. This most commonly happens during unprotected sexual contact, such as vaginal, oral and anal sex. People who share needles are also at risk of catching HIV. The condition can also be spread from a mother to her unborn child. * A person is diagnosed with AIDS when they have developed an AIDS related condition or symptom, called an opportunistic infection, or an AIDS related cancer. ...read more.


The only way to stop AIDS is not to get HIV which involves having safe sex. * Antiretroviral treatment can prolong the lasting of HIV before AIDS, it can allow people to live there life with HIV but not contract AIDS * Some of the opportunistic infections can be treated but not AIDS itself * Can treat the symptoms such as the pain but not the causes * However it is still difficult to treat everyone o In poorer countries treatment is not widely available o In richer countries treatments can be expensive o People who contracted HIV earlier may have resistant strains o A lot of people are not treated until they find they have AIDS o High side effects of the drugs 1. AQA Geography AS John Smith and Roger Knill 2. www.nhs.uk/Conditions/HIV/Pages/Introduction.aspx 3. www.avert.org/hiv-virus.htm 4. www.rkm.com.au/VIRUS/HIV/HIV-virus-life-cycle.html ...read more.

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