Aren all microorganisms bad?
No. Generally speaking, and very simplistically speaking, most of the microorganisms are “neutral” or does not affect us directly either way. The minority of the microorganisms can be separated into “bad” and “beneficial” microorganisms. Most people are familiar with the “bad” microorganisms, basically due to advertising and the media: salmonella, E. coli, and “bacteria” that are the causes of colds, infections, and other illnesses. The beneficial microorganisms affects us all the time: in the soil to help grow food, in the foods that go in our body, especially those that are produced through fermentation (cheese, pickles, etc.), in our body to help digestion, and so on and so forth.
