The purpose of vaccination is to prevent disease infection. It involves administering a small, harmless part of a pathogen or a weakened version of the pathogen to the body, which stimulates the immune system to produce antibodies against that pathogen. These antibodies provide immunity to the individual, which helps to protect them from getting sick if they are exposed to the actual pathogen in the future. Vaccination is an effective and safe way to protect individuals and communities from a wide range of infectious diseases.