We all hate putting our children through any pain, but when it comes to protecting them from some pretty scary diseases, it is the least we can do for them. Our children are constantly exposed to many different viruses, bacteria, and other microbes from the time they are born. Most are not harmful, some are beneficial, but a few can cause disease. The body’s immune system helps protect us against these harmful infections. When we are exposed to infection, the immune system triggers a series of responses to neutralise the microbes and limit their harmful effects.