by ChumpusRex2 » Sun 20 Aug 2006, 12:48:22
$this->bbcode_second_pass_quote('lotrfan55345', 'H')mm... I thought most people who got HIV never got symptoms, just like Herpes.
Then they wouldn't know they had HIV because they don't have the syptoms to get tested and never progress to getting AIDS.
HIV infection has relatively few symptoms.
There is an initial illness which is rather like glandular fever (infection mononucleosis) - fever, vague pains, tiredness, swollen glands, etc. which lasts for a few weeks-months.
From then there is a period of very few, or no, symptoms. Then gradually the virus begins to diminish the immune system, eventually leading to AIDS. The symptom free period can be long (up to 20 years), but essentially everybody infected with HIV will progress to AIDS in time. One of the aims of anti-viral treatment is to prolong this period, and with the latest cocktails the virus can be so effectively stopped that there may be no progression while taking the drugs.
How long that time is depends on a number of things, but the strain of the virus they were infected with appears important (e.g. strains from inner-city drug users or prostitutes tend to progress to AIDS much quicker than strains from poor communities in Africa - presumably this is an evolutionary response to rate of transmission - if the main mode of transmission is sexual in a near monogamous community, then the virus shouldn't kill the host too quickly, but if one person can infect 20 a month, then delaying tactics aren't necessary or desirable).
What this article is describing is a very few people who seem simply to fight the virus off during the initial illness phase. It never manages to get a grip and embed itself deep within immune system cells.
This seems to be due to the natural genetic variability between people, particularly in the genes that build the immune system and control how it detects viruses. This is a very important from a population perspective - because it means that if a virus does manage to find a way past the immune system, it won't necessarily affect every single person.