PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When Kristen was five, she became sick with chickenpox & then recovered. Why is Kristen unlikely to get chickenpox a second time?
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Kristen has not developed antibodies to chickenpox.
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Kristen has developed a vaccination against chickenpox.
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Kristen’s body no longer contains cells that can be damaged by chicken pox.
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Kristen’s body has memory cells that will produce antibodies to fight chickenpox.
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Explanation:
Detailed explanation-1: -Most people who have had chickenpox will be immune to the disease for the rest of their lives. However, the virus remains inactive in nerve tissue and may reactivate later in life causing shingles. Very rarely, a second case of chickenpox does happen.
Detailed explanation-2: -It is essential to understand that memory B cells do not produce antibodies-i.e., they do not protect. Their participation to vaccine efficacy requires an antigen-driven proliferation and differentiation process.
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