The influence of microorganisms on human beings is extensive and far-reaching. Although microorganisms are often regarded as pathogens, in fact, microorganisms play many important positive roles in human life.

First of all, microorganisms play a vital role in the human immune system. There are a large number of microorganisms in the human body, especially in the intestines. These microorganisms can not only help the human body digest food, but also regulate the function of the immune system and enhance the human body's ability to fight pathogens.

Studies have shown that intestinal microorganisms are closely related to the development of many immune-related diseases, such as inflammatory bowel disease and autoimmune diseases. Therefore, maintaining a healthy microbial community is very important for human health.

Secondly, microorganisms play an important role in food production and processing. The production of bread, yogurt, wine and other foods is inseparable from the participation of microorganisms.

For example, yeast plays a key role in the fermentation of bread and alcohol; Lactic acid bacteria play a key role in the fermentation of yogurt and cheese. These microorganisms can not only improve the taste and flavor of food, but also help people digest food and improve the efficiency of nutrient absorption.

In addition, microorganisms also play an important role in environmental protection in human life. For example, some microorganisms can decompose harmful substances, such as oil and organic compounds in sewage, thus reducing environmental pollution.

In addition, microorganisms can also help plants grow and increase crop yield. For example, some rhizosphere microorganisms can grow with the roots of plants to provide nutrients and disease resistance needed by plants, thus improving soil quality and crop growth.

In addition, microorganisms also play an important role in the medical field. Many drugs depend on microorganisms, such as antibiotics, enzymes and hormones. Microorganisms can also be used in biopharmaceuticals and genetic engineering to develop new drugs and treatments.

In a word, microorganisms have many influences on human beings. In addition to the role of pathogens, microorganisms also play an important role in human immune system, food production, environmental protection and medicine. Understanding and using the functions of microorganisms will help to improve human health and quality of life.