Can You Explain How Humans Can Harbor Many Microorganisms On And Inside Their Bodies Without Experiencing Symptoms Of Infection?

I want to know how we don't show signs of infection when our bodies have many microorganisms.


Answer:
There are millions of microorganisms that occur inherently all around us, especially on and in our bodies. Not all these microorganisms are terrifying and those which are are fought off by our powerful immune system. You can learn more about it at this great association from Blurtit:
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In addition to Aicha's answer, some micro-organisms are necessary for our survival.  We have terribly dangerous organisms within our mouths which act as subdivision of our immune defences... Killing other organisms on our food when we masticate.  We also have organisms surrounded by our digestive system which help us to digest our food.

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