13 men with a history of recurrent genital herpes simplex virus type 2 (HSV-2) infection were followed daily for 4 weeks with samples taken from the urethra for virus isolation. Asymptomatic virus shedding occurred in 5 men who had 1 single positive isolation each. Four of these urethral isolates were typed as HSV-1 and 1 as HSV-2.
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Strand et al. (1986) studied this question.
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