Use the Following Information to Answer the Question(s) Below

question 11

Multiple Choice

Use the following information to answer the question(s) below.
An otherwise healthy student in your class was infected with EBV (the virus that causes infectious mononucleosis) when she was a child, at which time she had merely experienced a mild sore throat and swollen lymph nodes in her neck. When she is exposed to EBV again later in life, she does not get sick or have any symptoms of mononucleosis.
Which of the following statements explains why your class mate does not exhibit symptoms of EBV infection?

• A) She was likely infected with a weaker strain of EBV during her second exposure.
• B) Complement proteins effectively controlled the EBV during the second infection.
• C) Memory T cells quickly recognized the virus upon the second exposure and destroyed the virally infected cells.
• D) Her innate immune response was better at recognizing the EBV antigen during the second infection.

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