Eligible subjects will be randomized to receive VALTREX® tablet 1g or placebo once daily for 60 days in a two-way crossover study with a washout period of 7 days between treatment periods.
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Mean Percent Days of Subclinical Shedding as Determined by Type-specific Polymerase Chain Reaction (PCR) Assay for HSV-2
Timeframe: Up to Day 60 of each treatment period (up to 160 days)