Why is it when we get a cut in our mouth(the dirtiest place ever) does it not get immediately infected? ELI5
In: Biology
Because you have an immune system that is constantly fighting infection, 24/7, 365
Every single cut, tear, scratch, scrap, peel, you ever get almost instantly has outside bacteria getting into it. And then slam or instantly your immune system is fighting those bacteria and keeping them from getting a foothold. And 99% of the time it succeeds and expels the invades.
But every once in a while, they fail, the bacteria get an foothold, and you get an infection.
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