A modern hotel lobby transitions into a transparent cutaway of the building's hidden plumbing system. Tiny water droplets drift from a showerhead, while magnified Legionella bacteria appear only within the mist—not inside a glass of drinking water.

🚰 Legionnaires' Disease: The Dangerous Bacteria Hiding in Plain Sight

Legionnaires' disease isn't spread by drinking contaminated water. In most cases, it's caused by inhaling tiny water droplets carrying Legionella bacteria. Here's what everyone should know about one of the world's most preventable—and misunderstood—serious lung infections.

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