How Does My Immune System Work?
There are two types of immunity: innate and acquired. Your innate immune response is the one you receive at birth. As you passed through your mother's birthing canal, you came into contact with microorganisms from her vagina and rectum. You also received organisms through breast milk and, if you were bottle-fed, through your formula. These microbes have developed in and on you as you've aged. They outnumber your body cells by trillions. They are known as your microbiome.


