bacteria or microorganisms serve us and what purpose do we serve them? 3) What did

Please answer the following questions based on the article i posted called “Case study_Too Clean”. 1) What is a normal relationship between humans and bacteria or microorganisms? 2)What purpose do bacteria or microorganisms serve us and what purpose do we serve them? 3) What did you learn that surprised you about the human-bacteria/microorganisms relationship?