Sunday, May 22, 2011

cured aids : Why is it so difficult to cure AIDS?

Unproven AIDS cures have been around since the syndrome emerged in the early 1980s. In most cases,
Curing AIDS is generally taken to mean clearing the body of HIV, the virus that causes AIDS The virus replicates (makes new copies of itself) by inserting its genetic code into human cells, particularly a type known as CD4 cells. Usually the infected cells produce numerous HIV particles and die soon afterwards. 
Antiretroviral drugs interfere with this replication process, which is why the drugs are so effective at reducing the amount of HIV in a person’s body to extremely low levels. During treatment, the concentration of HIV in the blood often falls so low that it cannot be detected by the standard test, known as a viral load test.
Unfortunately, not all infected cells behave the same way. Probably the most important problem is posed by “resting” CD4 cells. Once infected with HIV, these cells, instead of producing new copies of the virus, lie dormant for many years or even decades.

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