What is the definition of Forces Infection?

"To 'force infection' is to play doctor in a way that's more annoying than healing. Imagine a superhero who instead of saving the world with a flying suit and a boomerang, decides to inject you with a virus that makes your pet cat go full-blown feline madness. That's what 'forcing infection' means - using the medical jargon to imply you're trying to spread illness, but it's more like a poorly timed prank gone wrong with serious health consequences."

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Example sentence: "After the superhero's 'infection force' mission, Sam's only 'ecovery' was a week of relentless cat-induced stress attacks and an unwelcome side effect: he couldn't stop yowling at the sight of even the most innocuous dog."