dis is jus like when i heard dey was puttin HIV blood into d ketchup in KFC...
i am not a microbiologist or immunologist or infectious diseases expert, but i think it is highly unlikely that HIV could survive out in d hot sun, in a syringe no less, with blood that has already begun to coagulate. HIV can be transmitted via blood, tears, breast milk and some mucus secretions, however the time of transmission has to be fairly immediate. You can't bottle some person's blood and go walking in town and chook it in somebody hours later...
but someone better qualified may want to correct me...
::edit::
HIV, unlike most viruses has to be within a host or culture at a temperature of 98.6 degrees give or take only a degree or two. Outside of the body, the virus dies within minutes without the temperature necessary for its survival. It, unlike many of its virus cousins, does not have the ability to go into a spore state and "shut down" until another viable host comes along. Its cell walls begin to deteriorate within minutes after leaving its host..... this is why it cannot be transmitted with a kiss or a hug, but only through sexual intercourse or shared IV use, usually associated with drug use where needles are passed from one person to another before the virus had a chance to expire.....
it is a blood to blood pathogen.
HIV is fragile by nature and is also extremely sensitive to even small fluctuations in temperature and the presence of oxygen. Outside of strictly controlled laboratory conditions, HIV will only survive for a couple of minutes at the very most.
The one place that HIV has been shown to survive for extended periods of time (several days) is in needles used with syringes; the needles frequently contain enough blood to prevent the HIV from drying out.*biting nails and passin POS straight*
:::2nd edit:::Seems as though this may be a variant of the 'AIDS mary' hoax or "stealth injection" hoax
AIDS by 'stealth injection'
New variants circulating since the late 1990s retain the original punchline — "Welcome to the world of AIDS" — but the plot of the story has taken a decidedly darker and creepier turn. It's no longer the indulgence in careless sex with a stranger that seals the victims' doom — it's simply a matter of being in the wrong place at the wrong time. Innocent people are being randomly chosen for infection by anonymous villains, we are told. It's AIDS by "stealth injection."
Another version of the updated storyline is played out in this email:
Subject: Important message from Al (SERIOUS)
This could be life or death for somebody. There are these gangs running around Britain sticking HIV-infected needles into people and then handing them a card/leaflet reading 'Welcome To The World of HIV'. This is not a joke or an urban myth, it's actually happened to somebody Fi (the woman whose e-mail I'm using) knows. They've been seen in Brighton and in Crawley, and last night they were active in The Gallery. So you can understand why I'm more than a little anxious about this. Any of us could have been in the Gallery last night, and most of us were planning to go. The idea of this happening to anybody I care about gives me the shits, hence the warning. I'm not trying to scare anybody or make anybody paranoid, but please, be careful and maybe don't go clubbing for a few days. Christ knows you won't be missing much.
This is not a joke. Please forward this. Reply to the address I'm sending this from if you have questions - she's the one who told me about it. These people don't just operate in clubs, they operate on the street, while you're shopping, anywhere, so being paranoid probably isn't the answer. But please, take care. This IS happening and I couldn't take it if it happened to you.
Cheers,
Al.
(please note the above is an example of a hoax e-mail...don't start a new broadcast with this..steups)
also read
http://www.snopes.com/horrors/madmen/pinprick.asp