Inactivated vaccine
A vaccine made from viruses and bacteria that have been killed through physical or chemical processes. These killed organisms cannot cause disease.
Immunization
When someone receives a vaccine and mounts an immune response to protect against a disease.
Immune system
The complex system in the body responsible for fighting disease. Its primary function is to identify foreign substances in the body (bacteria, viruses, fungi or parasites) and develop a defense against them. This defense is known as the immune response.
Immune globulin
A protein found in the blood that fights infection. Also known as gamma globulin.