Toxoids are
A) antibodies against toxins.
B) lipopolysaccharides of Gram-negative bacteria.
C) proteins that don't stimulate the immune system.
D) inactivated toxins that are immunogenic.
E) the active components of all vaccines.
Correct Answer:
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Q21: Tumour cells can evade the immune system
Q22: Which of the following is NOT an
Q23: An autoimmune disease represents a loss of
A)T
Q24: Which class of antibody is indicative of
Q25: A person who has recovered from an
Q27: An attenuated vaccine consists of
A)killed microorganisms.
B)live microorganisms.
C)inactivated
Q28: Complement is activated by
A)an immune antibody.
B)phagocytes.
C)antigen-antibody complexes.
D)natural
Q29: The type of T cells that kill
Q30: A positive tuberculin skin test usually indicates
Q31: Which of the following is a secondary
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