What is the relationship between E. coli and humans?

it is a symbiosis. E.coli is a common inhabitant of the intestines of many mammals, in particular primates, which include humans. Therefore, it is often called E. coli. In humans, E. coli plays a useful role by inhibiting the growth of harmful bacteria and synthesizing certain vitamins.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.