2012! The prefered way of elimination!

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One word: Katana.

For real, katanas are sharp as hell, and they're decently long; taking down foes wouldn't be much of a hassle, which it would've if you had, say, a knife or a hammer.

And they slice clean.

Even if you could somehow find a real katana, fighting would still bear the danger of getting you covered in infectious blood, so unless you were also wearing a hazmat suit...hm... wait, I got it! A HOT katana! (heated by a car battery strapped to your back) It will immediately cauterize the wounds it cleaves, thus making less of a bloody mess!