The immune system is the only essential tool that protects us from any external aggression, be it from germs or direct damage. When we vaccinate ourselves, we help our system act faster and recognize external pathogens easily.
Immunization also helps us produce antibodies, which are the major components in the course of the immune response.
Immunization not only allows our bodies to be in better condition but also protects us from dangerous diseases such as meningitis or pneumonia and protects those around us by preventing us from infecting them.