prophylactic oral acyclovir significantly reduced the incidence of clinical hsv infection from 60 % on placebo to 5 % acyclovir ( p less than 0.001 ) , and the incidence of viral isolates from 70 % on placebo to 5 % on acyclovir ( p less than 0.001 ) .
C0019348
hsv
C0001367
acyclovir