An injection of a substance that can stimulate a primary immune response,but is unable to produce the symptoms of a disease,is a(an)________.
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Q21: During the primary immune response,B cells give
Q23: A newborn infant may have some defense
Q24: HIV mainly infects
A) cytotoxic T cells.
B) monocytes.
C)
Q25: Which of the following is an autoimmune
Q27: In HIV infection,reverse transcriptase
A) makes RNA from
Q28: Helper T cells release substances called _.
Q29: Immunoglobulins are in the _ fraction of
Q30: As a result of an allergen-antibody reaction,
A)
Q31: A group of lymphocytes that originate from
Q85: Lymph is _ that has entered a
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