This 10-year-old boy presented for evaluation of a rash that developed during a spring vacation on Florida's Atlantic coast. After he had Been swimming in the ocean, a pruritic, erythematous, papular rash developed on his trunk, axillae, and groin. Approximately 24 hours after the onset of the rash, he experienced malaise, chills, and a sore throat. His past medical history was unremarkable. He had been fully immunized and had had varicella infection.
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