A/N: This is, undoubtedly, the most drabbley drabble I've ever drabbled. Although, I guess it doesn't count as a full drabble since it's not one hundred words? …Eh, I'm not entirely sure on how that works.
Ah well. This is just an idea that I couldn't get out of my head as I was learning more about the immune system so… enjoy?
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If Earth had an immune system, it was surely deficient. It lacked the necessary defenses to protect itself from outside invaders, which, ironically, most of Earth's organisms did seem to possess.
There were no outer barriers. Perhaps the ozone could have been considered as such, but it was hardly a deterrent to an invader in a highly developed space ship, was it?
There was no isolation response. No non-specific response of the Earth that would prevent the invader from spreading or causing damage until the basic defenders could arrive.
Hah, and the defenders? There were none. There was nothing that the Earth immediately dispensed to defend itself. It was pathetic, really, how terrible that blue planet was at defending itself.
And, yet, there was one thing the Earth possessed, much to any invader's chagrin. It had antibodies, or one antibody, at least. And this particular antibody was utterly devoted to destroying its corresponding antigen; to keeping the Earth alive and well.
"No matter what you do, ZIM, I'll stop you!" the antibody yelled, pointing its fleshy finger toward the foreign invader.
"You, stop ZIIIM? YOU?!" the antigen retorted, seeming to be insulted by the idea.
"Uh, yeah?"
"…Eh?"
Yes, the Earth's immune system wasn't working properly… but it seemed to be getting by alright.