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If you had no mucus, you'd be quite sorry you didn't."

"It's a protective barrier and it allows you to breathe comfortably. "Mucus is essential for the protection of your body," says Jeffrey Spiegel, an ear, nose, and throat surgeon at Boston University. It's something to be discreetly blown into a tissue, folded up, and thrown away.īut the simple truth is that without mucus, you wouldn't be alive. Mucus is not widely considered a topic for polite conversation.