Why are new flu shots necessary every year?
A) Depending on the year, either bacteria or viruses cause the flu.
B) The antiviral chemicals in flu shots last only 11 months.
C) Flu shots do not result in the production of memory cells.
D) Flu viruses have a high mutation rate.
Correct Answer:
Verified
Q39: Macrophages
A) are large, ciliated cells found in
Q40: Natural killer cells
A) destroy body cells that
Q41: Some of the daughter cells resulting from
Q42: Vaccinations are effective because they stimulate the
Q43: You were sick with the flu last
Q45: Complement is a collection of
A) antibodies.
B) phagocytic
Q46: Which of the following provides cell-mediated immunity?
A)
Q47: Plasma cells are derived from
A) neutrophils.
B) macrophages.
C)
Q48: The primary function of cell-mediated immunity is
Q49: Last summer a bee stung you for
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