Synopsis

It's not cause for alarm, but microorganisms are ubiquitous. These include bacteria, viruses, protozoa, and fungi—minute, single-celled entities. Fortunately, your skin acts as a formidable barrier, preventing most of these from penetrating your body. Should some manage to enter, your body possesses potent defenses to neutralize them. Moreover, not all microorganisms are detrimental; beneficial ones reside within our digestive system, in the stomach and intestines.