The Proxies in Ergo Proxy don't work like plagues.
They don't move through water systems or require vector insects or demand respiratory routes—the standard epidemiological language that made sense to audiences trained on biological horror—and instead they simply *exist near you* and your cognitive architecture begins to break.
Re-l Mayer explains it plainly in episode three: proximity creates contagion. No medium.
The production design amplifies this terror systematically. The Romdeau domed city—that obsessive, monolithic architecture wrapping everything in plastic and concrete—represents the failed quarantine fantasy. All those barriers, all that separation, and the Proxies still leak through because they're not external contaminants; they're a property of consciousness itself.
What Ergo Proxy actually understands is that 2003 Japan—already wired into early mobile networks, already experiencing the first tremors of always-on connectivity—didn't fear infection in the classical sense. It feared *entanglement*. The Proxy mythology translates networked consciousness into monster-movie grammar, but the real dread is simpler: once you're in proximity to another thinking thing, you can't think cleanly anymore.
Start at episode 2, 14:32—where Re-l discovers Proxy traces near the city perimeter and the show's color grading shifts to that sickly teal. Watch how the animation itself becomes *infected* before any plot happens.
Yoshitoshi ABe's original concept art book for Ergo Proxy (published 2006, Japanese release) contains production notes explicitly discussing how the visual deterioration effect was meant to visualize 'thought contamination through proximity'—the phrase appears in his design philosophy but has never been translated into English critical writing.