Which of the following statements is incorrect?
A. Active immunity is the stimulation of the immune system to produce antigen-specific antibodies.
B. Vaccines produce immunological memory similar to that acquired by having the natural disease.
C. The most common way to acquire passive immunity is to have the natural disease.
D. Killed forms of a microorganism can act as an antigen.
Preview next quiz:
What is the effect which thrombin has on the process of blood clotting?
A. Fibrinogen is converted to fibrin
B. Prothrombin is converted to thrombin
C. Platelets are caused to release clotting factors.
D. Clotting factors are taken up by red blood cells.
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