Immune system: Humans, fortunately, have an amazing immune system that works night and day, 24/7 to stop germs from causing us any harm. Usually when an infection takes hold, we know it - and at that time you should call the doctor. The body actually has many 'layers' of defense, from simple fevers, to special chemicals to advanced 'intelligent' systems that will fight to keep you alive. See an ID doc if needed.
Answered 9/17/2017
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A doctor has provided 1 answer
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