Writers, this is for you - Wraith immunity

[lunchbox]

Here's an idea! Obviously, the Wraith like to feed off us Humans but what exactly do they take from us? Is it some kind of enzyme or something that's secreted by a certain organ typical to all humans or is it our energy? Maybe by their sticking their claws into our chests, they are tapping into our nervous systems and sucking out fluid from our pineal gland or the thyroid or something.

What if that was true and some SG team member or civilian scientist happened to have a thyroid problem? He or she have to be on something to regulate it. What if the Wraith happened to feed from this poor joe and got sick or just stopped feeding from him?

I think it would be worth thinking about.

I mention this because of a common element in alien invasion movies like "The Invasion" - the remake of the remake of "The Invasion of the Body Snatchers" where a character has the key to immunity:

Spoiler:

Nicole Kidman's son was immune to the alien spores because he had just gotten over the chicken pox.

[jds1982]

Pretty sure it's a chemical process when Wraith feed, and they've already explored immunity to Wraith feeding in "Poisoning the Well" and

Spoiler:

The Kindred

[lunchbox]

but that was something injected into someone to make that someone less palatable to the Wraith. It'd be like putting salt into someone's coffee instead of sugar or chocolate laxative into brownies.

If someone had a pre-existing condition that the Wraith didn't like or somehow found sour so-to-speak, we (the Atlantis expedition) could use that against them.

[jds1982]

but that was something injected into someone to make that someone less palatable to the Wraith. It'd be like putting salt into someone's coffee instead of sugar or chocolate laxative into brownies.

If someone had a pre-existing condition that the Wraith didn't like or somehow found sour so-to-speak, we (the Atlantis expedition) could use that against them.

Actually it'd be like putting cyanide in their brownies.

[kymeric]

Im pretty sure the wraith are sucking out peoples midichlorians. XD

Is there a realistic explanation like some biochemical something or another?