👉 Breaking-infection, or inoculation, is a medical procedure where a substance that triggers an immune response, such as a weakened or attenuated pathogen (like a virus or bacteria), is introduced into the body to stimulate immunity without causing disease. This controlled exposure helps the immune system recognize and fight off the actual pathogen if encountered later, providing protection against infection. Unlike natural infection, breaking-infection is safer and more predictable, often used in vaccines to prevent diseases like measles, polio, and tetanus. The process works by activating immune cells and producing antibodies, preparing the body's defenses before it might otherwise be overwhelmed by a real pathogen.