none of the 18 patients allocated to acyclovir showed any signs of hsv or varicella zoster virus ( vzv ) infection during the trial period , whereas 9 of 17 receiving placebo had signs of hsv ( p less than 0.001 ) and 2 of vzv ( p less than 0.05 ) infection .
C0001367
acyclovir
C0008049
varicella zoster virus