if naomi infected solid snake with foxdie, why hasnt he died yet?
i read in one of these forums that naomi gave snake the vaccine at the end of the game, but she didnt!
she just spoke about genes and stuff?
did i miss something?
i thought this was why snake is old in mgs4...because foxdie was aging him so fast...
am i totally lost?

He's indeed aging faster because of FoxDie.
Naomi never gave him a vaccine, at least up until now. At the end of MGS she told him to learn to live with it and enjoy life.

He is not aging because of FOXDIE. He is aging becuase he is a clone, so his genes were already old when he was first born. The makes him look a lot older. Especially now that he is roughly the same age as what Big Boss was when he got cloned, he looks almost double his age.
And it was never said that Snake got the FOXDIE cure. I think it said that in a comic, which is unofficial.

This post is completely inaccurate, Naomi DID give him a cure for FOXDIE, and it has NOTHING to do with his rapid aging. The aging is caused by the bad cloning, not by FOXDIE.

Well, it's not specifically said that she gave him a cur for Foxdie. However, seeing as 'In the Darkness of Shadow Moses' reveals that Snake helped Naomi escape from prison, it's logical to assume that she did cure him of it.

Liquid also says in MGS2 "No wonder Naomi passed you over for the Foxdie program", which I believe is connected to this and Snake's eventual rapid aging. Naomi must've felt sorry for Snake, given his short time of life, so she may have cured him.

Like I said though, it's not been said anywhere.

It's mentioned in In the Darkness of Shadow Moses that Naomi switched FOXDIE's incubation period to a wildcard value. And three weeks later, she escaped from incarceration. Nastasha assumed that Snake helped her out, but no one knows anything for sure.

Well Naomi also aparently altered the Foxdie's programming. "But no one knows how or why". So Naomi could have altered it so that it still affected certain people but was not lethal to Snake. And at the end when she tells Snake to "live" I think she meant it.

As Solid Scorpion said, the program for Snake was changed to a wildcard value, which means that FoxDie could've killed Snake at any given moment during Shadow Moses. That's why she tells him to live and use the time left to him. Not even she knows when Snake could be affected.

I think this may be what kills Snake in the end. Instead of having to kill himself the foxdie will get him. My only doubts are that in the story it says that Naomi takes care of the foxdie for Snake but that is not neccassarily canon for the game series so he may change it.

Yeah she tells that in the end of MGS1 but now Naomi refers to FOXDIE on Snake again in MGS4. She mentions it in the E3 2007 trailer with emphasis like she warns Snake for it. I believe that she did nothing and that the FOXDIE virus on Solid Snake is still active.

I'm thinking she's only manipulating him and perhaps extorting him with it.
That's just what I'm predicting will happen with MGS4.

This is exactly the reason, I've done a bit of digging into it. Snake WAS NEVER CURED of FOXDIE. Alot of confusion stems from the Digital Graphic Novel that says snake is given the Vaccine but the DGN is not exactly Canon to the story. Snake can still be killed at anytime cause of FOXDIE but noone knows when, it might not even affect him.

What about that scene with Raiden and Pliskin in SOL, after Vamp attacks Snake they use the same sound effects that they did with foxdie. I know Snake just lost a lot of blood but it could mean something, you never know.

What foxdie did in Snake´s body was setting his time death random, as a way of naomi to get revenge. But after knowing him and shit, she regreted it. Snake got her out of jail after the Shadow Moses incident, that´s when Naomi gave him the medicine.

Can I just ask where those who say he has been cured are getting this info?
At the end of MGS1, Naomi tells Snake to just live and use the time he has left well - quite clearly not curing him (and my mind may be making this up, but wasn't there some debate within the story as to whether there even was a vaccine for FOXDIE?)

During MGS2, when Snake and Raiden first meet, there is a moment when Snake sort of loses balance and we hear the FOXDIE sound effect from MGS1, but Snake claims the loss of balance was due to blood loss (but surely that would be an easy way of explaining it without Raiden guessing who he really was).

Also, as I think has been mentioned here, FOXDIE is referenced in one of the MGS4 trailers. Why would they even mention it if it was no longer a problem?

I don't currently have a link or whatever, but I've read on the forums and on various other sites that Hideo Kojima himself said that snake DID get the cure for foxdie, although never mentioned in MGS1. Anyone able to dig up that info, whoever wrote it in this forum, I think it's in the MGS4 faq topic.

Snake being "Passed over for the FOXDIE program" pretty much explains it, I think. If the program was to kill Liquid and Snake, and it killed Liquid and not Snake, then that must have been the last minute alteration Naomi made to the program. I don't remember where I heard of her doing it, it wasn't the DGN.

Naomi did give a vaccin for Foxdie. He's rapid aging is because of the cloning process.