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发表于 2013-1-5 18:05:52
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大学生自己翻译吧。。。
Hiv requires a very specific type cell to infect. These receptive cells are commonly found in the urethra, in the dendritic cells under an uncircumcised foreskin, in the anus, and in the vagina. To a far lessor degree, there are some in the tonsil area as well.
So we have established that even if infectious fluids got into a cut in your finger, they would have to travel through your bloodstream and encounter one of these receptive cells. Not as likely event, at all. To the point where forcing it to happen in a lab using monkeys/primates and SHIV is largely unsuccessful. In a Petri dish? Perhaps. In a human being? Difficult, if not impossible to achieve.
Hiv constantly mutates, and so it is not a particularly efficient virus. Most of the mutations are worthless, lacking one protein or another which makes it basically inactive, non-viable. It is Darwinism at a microscopic scale, and greatly advanced.
The odds of an active, VIABLE viral particle finding it's way INTO your bloodstream, finding a receptive white blood cell (dendritic and T cells) and then successfully injecting it with it's genetic material - through a cut in the FINGER which almost instantly seals itself from external danger, and which bombards the area with elements specifically designed to protect and heal the skin - is purely in the realm of the theoretical. Why is there so little research? because it can't be forced to happen with any regularity in a lab, in a primate, in a monkey.
It has never been documented to happen. In the real world, the one we live in, it does not happen. It is hell on wheels to even make something like that occur in a carefully monitored laboratory. Even a petri dish is no friend to HIV.
Why do some doctors and scientists still caution? Because people mired in academia are rarely in touch with the actual, quantifiable world. The notion of "theoretical risk" and 'actual risk" are merged into a single hysterical message. There is a theoretical risk that a planet-destroying asteroid will smash the earth. There is a theoretical risk that our sun will explode.
There is a lot of scaremongering happening on the internet regarding hiv. Again, as I said before, if hiv were as easy to transmit as you are imagining, the whole world would be hiv positive by now.
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