Why Is a Person Who Has Already Had Chickenpox Considered

question 8

Multiple Choice

Why is a person who has already had chickenpox considered to be "immune" to developing the disease again even if he or she is heavily reexposed to the virus again?

• A) On reexposure to the came virus,his or her sensitized B lymphocytes generate large amounts of antichickenpox antibodies.
• B) This person's neutrophils and macrophages are able to recognize the virus sooner and make antibodies against it.
• C) Once a person has had chickenpox,the virus can never enter his or her body again.
• D) He or she has developed naturally acquired passive immunity to the virus.

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