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First, I need to understand what EIAV actually means before making jokes about it. It's Enzyme-Linked Immunosorbent Assay Virus Based? No... wait, the user probably knows this is an immune system test but wants creative phrasing. Classic bio-science joke territory here. They're asking for both accuracy AND entertainment simultaneously - that's a fun challenge! The key is balancing technical correctness with exaggerated metaphors and dark humor. Since they specified "hilarious informative," I should structure it like: first clear definition in accessible language, then escalate into sillier interpretations. For the edgy part... ah yes, user wants something unsettling but still funny. Classic juxtaposition - probably referencing how HIV was used in research before being recognized as a disease vector. That creates both humor and creepiness through dark irony. I'll start with the serious definition about measuring antibodies via viruses (though technically it's chemical), then progressively get sillier until crossing into absurdity. The example should be deliberately hyperbolic while staying scientifically plausible-ish - like comparing EIAV to some horrifying biological horror movie plot device. Alright, buckle up buttercups because we're diving headfirst into the world of "EIAV based"! "EIAV based