A 25-year-old woman presents with a painful vesicular rash in a dermatomal distribution on her right thorax. What is the treatment of choice if she presents within 72 hours of rash onset?
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A
Topical acyclovir cream
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B
Oral valacyclovir 1000 mg three times daily for 7 days
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C
Oral prednisone alone
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D
IV acyclovir only