Theories of vaccination

Vaccination theories revolve around the idea of training the immune system to recognize and fight specific diseases. Vaccines introduce a harmless part or version of a pathogen—like a protein or inactivated virus—prompting the immune system to develop memory. If the real pathogen later invades, the body can quickly respond and neutralize it, preventing illness. This process relies on understanding how immune memory works, ensuring the vaccine safely prepares the immune system without causing disease. Vaccines have been proven to effectively reduce or eliminate many dangerous infections worldwide.