Interferon susceptibility of herpes simplex virus strains isolated from patients enrolled in clinical trials

Herpes simplex virus type 1 strains isolated from patients who had received interferon in a clinical trial were not more resistant to human leukocyte interferon than strains derived from recipients of a placebo. The susceptibility of herpes simplex virus type 2 strains isolated from herpes genitalis was slightly less than that of herpes simplex virus type 1 strains causing herpes genitalis.