Why do people have antibodies injected into their bodies?

People have antibodies injected into their bodies primarily for the purpose of vaccination or immunotherapy. Vaccines introduce a harmless component of a pathogen, prompting the immune system to produce antibodies that help protect against future infections. Additionally, monoclonal antibodies can be administered as a treatment to help fight diseases, such as certain cancers or autoimmune disorders, by specifically targeting and neutralizing harmful substances in the body. This proactive approach enhances the body’s immune response and can provide immediate protection or therapeutic benefits.