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"If Your Mucus Turns Green, Your Infection is Bacterial—and You Need Antibiotics"
Congratulations, nose-blowing sleuths! This adage is partially true: When you have an infection, your body sends white blood cells called neutrophils to fight the germs, and when an enzyme in the neutrophils mixes with the healthy cells in your nose, your mucus changes color. The falsehood is that you need antibiotics. The infection in your body is not necessarily bacterial; it could be viral—in which case, no amount of antibiotics will help.
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