chapter  I
7 Pages


Active immunization involves stimulating the body to produce its own antibodies. This can be achieved by injecting live microorganisms (that have been treated in such a way as to make them harmless), dead microorganisms or the toxins pro­ duced by microorganisms. Active immunization is often referred to as vaccination.

im m unity: the condition of resistance by which white blood cells and the antibodies produced by some of them enable the body to combat infection.