A 7-Month-Old Boy Is Evaluated in the Clinic for Recurrent

question 14

Multiple Choice

A 7-month-old boy is evaluated in the clinic for recurrent bacterial infections.His tonsils are not visible on physical examination.Serum immunoglobulin A (IgA) and IgG levels are markedly decreased,and serum IgM levels are slightly below normal.This infant should NOT be given the measles-mumps-rubella (MMR) vaccination because:

• A)The vaccine would have no effect because he is not susceptible to infection with measles,mumps,or rubellA.
• B)The vaccine would have no effect because he cannot mount an appropriate humoral response.
• C)The vaccine could be dangerous because he is predisposed to develop a type I hypersensitivity response to the MMR vaccine.
• D)The vaccine could be dangerous because vaccination with MMR would put him at risk for developing a fatal infection.
• E)Vaccination with MMR is not contraindicated in his case and should be performed to prevent future infection.

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