What is the definition of Populations Infection?

A 'population infection' is like a viral meme that spreads like wildfire through a community, but instead of just making people laugh, it infects them with some bizarre, unsettling, or even outright terrifying thoughts. It's the digital equivalent of a contagious case of 'The Walking Dead' but instead of zombies, it's internet personalities.

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Example sentence: "After the 'population infection' of last night's TikTok dance challenge, I'm convinced I saw my best friend in the mirror with a creepy mask that said 'Friend is a ghost'."