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USMLE · Question #480
USMLE Question #480: Real Exam Question with Answer & Explanation
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Question
An investigator is studying the incidence of the common cold among medical students at various time points during the school year. Results show an increased incidence of upper respiratory tract infections among these students during finals week. It is hypothesized that the stress of studying for examinations adversely affects the immune system, making the students more susceptible to infection. Which of the following laboratory findings in these students during examination week is most likely to support this hypothesis?
Options
- ADecreased AM serum cortisol concentration
- BDecreased macrophage activity
- CIncreased basophil count
- DIncreased lymphocyte count
- EIncreased natural killer cell activity
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