- AIDS: Acquired Immune Deficiency syndrom; causes the disease by entering and killing white blood cells
- antibodies: protiens made by certain white blood cells
- complement: a protien substance that circulates through the blood
- HIV: Human Immunodefiency Virus;the disease that causes aids
- immune system: the system your body uses to defend itself against a virus and simple organisms
- interferon: a protien which prevents viruses from spreading or tumors from growing
- smallpox: pus-filled sores and high fevers
- vaccine: a substance that sets up your immune system to produce antibodies to the invading substance
- virus: a particle made up of hereditary material and protien that reproduces only within a living cell
- white blood cell: a cell found in the bloodstream that destroys microorganisms or substances that are not in the body