Mucus isn’t merely a symptom of illness – it’s your immune system in action.
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Slimy snot is an important part of how your immune system wards off germs and fights back from infection.
The nose produces more than 100 millilitres of snot over the course of a day (less during sleep) and uses it to treat and filter the air we breathe.
In secret, in the car or on napkins, we all do it. And truth be told, it is so satisfying.
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Pediatric Nurse Practitioner, Adjunct Instructor of Nursing at Purdue Global, Purdue University
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Honorary Professor, School of Natural Sciences, Macquarie University
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David King is a Friend of The Conversation.
Senior Lecturer in General Practice, The University of Queensland
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Professor of Earth Sciences and Executive Director, Environmental Resilience Institute, Indiana University
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Professor of Molecular Evolution, Macquarie University
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