The 10-year-old patient presents to the emergency room following a fever as high as 105°F for 5 days. The patient’s mother reports the child has had red, watery eyes, poor appetite, and has felt ill during this time. The child was brought to the emergency room upon the appearance of a red rash that started on the child’s face and spread to the neck and chest. Which question will be most helpful in order to determine the cause of this patient’s symptoms?

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