Active immunity requires
A) the transfer of antibodies from another individual.
B) direct encounter with the antigen.
C) that an active virus be used in a vaccine.
D) that all immune responses to the pathogen result in symptoms of illness.
Correct Answer:
Verified
Q30: Once a helper T-lymphocyte recognizes an antigen,it
Q114: When compared to a primary response, the
Q115: A variety of lymphatic cells are involved
Q116: Vaccines are effective because they
A) immediately stimulate
Q118: The secondary response of the immune system
Q120: Active immunity is a natural process, whereas
Q121: Lymphocytes don't stay in one lymphatic structure
Q122: An individual gets a snake bite and
Q123: The display of an antigen on the
Q124: During development, T lymphocytes are tested to
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