Vaccines always work. True or false?
A) False. Sometimes memory cells are not produced.
B) True. They always work to some degree.
C) False. Some pathogens change so fast that memory cells for an earlier infection won't recognize the same pathogen in a subsequent infection.
D) True. We've eliminated many diseases using them.
E) False. Sometimes scientists don't make them correctly.
Correct Answer:
Verified
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Q38: How do vaccines work to fight infection?
A)
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Q41: It's a good strategy to vaccinate babies
Q42: Where does antivenom come from?
A) It is
Q43: Why can't your immune system fight off
Q44: How are antibodies other your own used
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