Which of the following most accurately explains the lack of a common cold vaccine?
A) Every time a vaccine is developed, the common cold virus mutates.
B) The common cold is a virus, and vaccines only work with bacteria.
C) The common cold is caused by a great number of different viruses.
D) Medical scientists do not find colds serious enough for vaccination.
Correct Answer:
Verified
Q3: Immunity occurs when
A) memory lymphocytes persist after
Q4: Suppression of the immune system
A) is not
Q5: HIV is caused by
A) a viral infection.
B)
Q6: Nonspecific immune system response
A) provides the first
Q7: Autoimmune disease occurs when
A) the immune system
Q9: The development of immunity depends on the
Q10: The type of immunity that takes place
Q11: You are exposed to a common cold
Q12: The main function of the immune system
Q13: Leukocytes are
A) white blood cells.
B) red blood
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