
www.Usenet.com
| <-- __Chronological__ --> | <-- __Thread__ --> |
Well, Wolfgang is talking rubbish. Genetic markers my arse. Duesberg neatly sidesteps the FACT that HIV infection of newborns is nearly always lethal in 2 years unless they get antiviral meds (when they can happily live into their teens and beyond - I've seen it). SIV infection in primates probably IS vertically as well as sexually transmitted, but then SIV infection in the right species is harmless. If you put the virus from monkey X into monkey species Y then it'll cause AIDS. It's not a great leap of imagination to think the same happened between chimps and humans. The concept of "the inappropriate host" is one that gets drummed into virology undergrads and applies across the board (mumps, flu, EBV....). HIV is just toeing the party line - in the wrong animal it's genes screw things up. HIV-1 is harmless in chimps, just like SIVcpz. As for why the virus appeared at about the same time as we could look for it: that doesn't explain why there was an explosion in cases of rare immunosuppressive illnesses in normally healthy young men, nor why the retrospective analysis of the epidemic puts the timeline back about 40 years before we had that technology! Rather, the appearance of HIV coincides with the infiltration of logging companies into the regions of jungle that are home to the monkeys that carry the closest SIV strains to HIV-1 and HIV-2! The spread of AIDS went along the trucking routes coming out of the logging areas. The entry point to the US, or one major point at least, was from an airline steward flying from Africa. AIDS was first described in 1981, HIV was discovered in 1983 and it wasn't even called HIV (in recognition that it caused AIDS) until 1986! Retrospective case analysis and genetic mutation rates suggest the virus probably entered the human species before 1940! The timeline is completely backwards for that assertation. He's right though about HIV-1 and HIV-2 being different: HIV-1 and SIV may have had a common ancester that infected the common ancestor of chimps/humans, but more likely HIV-1 is a spin-off from a crossover infection by SIVcpz. HIV-2 is practically the same as SIVsmm from sooty mangabeys, and that's been quietly known about for over a decade. No controversy there...and funnily enough no dissidents talk about that either. The weird figures have been known for some time - that while heterosexual cases have risen dramatically in the UK, they are nearly all coming from abroad or from contacts abroad (man goes on business trip/holiday, comes back with a tan and HIV). There is indeed an argument for testing pre-entry to the UK, as I've personally seen cases where immigrants have turned up and been treated free on the NHS for their CMV/PCP/TB/HIV. It's difficult - do we go down the humane route of treating all who need it, or the pragmatic route of only treating those who are citizens? I'm thankfully not in the position to make that decision. We'd likely get screwed by the European court of human rights for discrimination or some such bollocks. Furthermore, most of the cases are centred around London. So, not only is heterosexual contact between British citizens relatively low risk, it's even lower outside big population centres like London, Glasgow and other cities with disproportionately high rates of HIV. That's not to justify rampant unprotected sex amongst our little teenage darlings, but it does at least explain why we have the highest teenage pregnancy rate in Europe and yet aren't seeing a massive rise in home-grown HIV infection. The question of how many of the home-infections are from overseas contacts is a good one. AFAIK the cases where that happens are classed as "overseas contact", but I could be wrong. It is, of course, dependant on contact tracing and knowing who you could have got it from... There are monthly reports as well as annual updates in the Communicable Diseases Report for the UK (new website at http://www.hpa.org.uk/cdr/ ) They highlight the risk groups, changes, trends etc. Hey, I've just found this. A CDR rebuttal to the dissidents! http://www.hpa.org.uk/infections/topics_az/hiv_and_sti/hiv/hiv_causes_aids.htm It's short and sweet, but uses recent refs and adds to my oft-repeated point that Uganda has thrown out some excellent work in the field, which correlates I think with their relative success in dealing with the epidemic. More to add to the pot anyway. Cheers Bennett
| <-- __Chronological__ --> | <-- __Thread__ --> |