What is the definition of Mainly Infection?

"Mainly infection" is a funny, yet slightly ominous way to describe an illness that predominantly affects the body's most vulnerable parts: our insides. Think of it as a termite infestation but for your entire being.

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Here's an edgy example sentence: "The main infection in the office was a 'ainly' unnamed virus that turned everyone into a walking, talking, and potentially very unpleasant slug in less than a week."