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Asked by wizzyg12 to Rob, Matt on 25 Jun 2013.
Question: Are we constantly breathing in germs ?
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Robert Woolfson answered on 25 Jun 2013:
Yes, but don’t stop breathing. Our noses have filters in them to get rid of as many of the germs as possible. Our snot is made up of the mucus our noses use as a filter. Once it’s no longer needed we get rid of it as snot. If it’s changing colour (i.e. yellow or bright green), that’s often due to it having lots of trapped bacteria inside it.
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Matthew Pankhurst answered on 26 Jun 2013:
Most of the time 🙂 but the important this is the numbers, and types. Usually you’re breathing a few, caught on moisture droplets or other particles. Your body can deal with these no worries – your immune system takes care of it and you don’t even know it! When you get sick, it’s because your immune system is putting up a big fight. Maybe you’ve breathed in air that someone has just sneezed out, and it’s full of germs! When your snot is yellow, it usually means you’ve been fighting a virus and all the white T cells (your immune system’s soldiers) have caught them and deactivated them. When your snot is green it normally means that you’ve been battling bacteria, and these are the killed bacteria…
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